How a Viral Loop on LinkedIn Got Me 76k Email Subscribers in 1 Month

Anna Vital

Anna is an infographic designer. She publishes and teaches how to create infographics to maximize traffic. Anna is also a founder of Adioma, the simplest infographic tool for narrative data.

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    I want to share an elegant trick where a “viral loop” on LinkedIn got me over 76,000 email subscribers in just one month.

    I know the audience of Ahrefs blog mostly comes here for SEO insights, advice, and studies. And there’s no doubt that good SEO will create a steady, passive stream of visitors to your website.

    But it can take quite a while to get good results.

    A recent study here at Ahrefs has shown that almost 95% of newly published pages don’t get to the Top10 within a year. That’s why when you’re bootstrapping your startup you need to start working on your website’s SEO as soon as possible.

    Hence you need a kind of marketing move that can start bringing you customers right away.

    That’s what we call a “growth hack.”

    A huge, quality list of email subscribers is probably the most promising thing to “hack.”

    I am going to show you a simple trick that got me 76k+ email subscribers in less than a month.

    Here’s a screenshot of my email list growth over the past 30 days:

    You may have seen better, but for me that was a tremendous success!

    To get these results, I started a “viral loop” on LinkedIn where I played the curiosity card. Let me show you exactly how to do that.

    The Concept

    One day, as I was checking my LinkedIn feed, I saw that one of my connections had commented “Yes” on some post with free presentation slides.

    As a designer, I’m seeing tons of such posts with templates and slides and stuff. But this time I wondered:

    Yes” what?

    I opened the post and saw thousands of other people writing the same comment: “Yes”.

    Naturally I wanted to figure out what was going on there.

    Having dug deeper I uncovered a small group of other similar posts. Here are just a few examples:

    They all looked almost the same:

    • They were giving out something free yet valuable in their post.
    • The post had a link to the opt-in form. So people had to give their email address in exchange for the “opt-in bribe.”

    Nothing special so far, right? But there was one more thing:

    • One also had to comment “Yes” on a post to get that freebie.

    The latter was a gamechanger. By adding this simple comment, people were spreading this post like hell in front of their own LinkedIn connections, bringing more and more people to it and dragging them into a viral loop.

    This whole concept hang upon people’s curiosity. And it worked like a charm!

    As more and more people saw the article and got a freebie, a viral loop was born. And the author’s email list was growing like hell.

    Seeing what they did, I created my own presentation templates to give away and ran a similar campaign.

    Here’s what I did

    Now let me share the exact steps I took to imply a similar strategy to drastically grow my email list.

    1. Create a valuable download

    No matter what tricks and hacks you’re using to bring people to your post, you must offer something really valuable in it.

    In my case, it was a set of templates for PowerPoint. The templates were easily editable and could be a perfect basis for any presentation. People love such stuff.

    But you are not limited to presentations here. Other examples I have seen include email templates, marketing checklists or even discounts — anything people in your niche find valuable and would like to get.

    2. Write a LinkedIn article to present your freebie

    Explain why people need your freebie and what exactly they will get in your LinkedIn article.

    Give your article a headline explaining what freebie you’ll be giving out. People should instantly understand its value.

    Mine was: Presentation Templates for PowerPoint (Free download)

    I used the word “PowerPoint” in the title as I anticipated people knew exactly what PowerPoint was and how easy it would be to use my presentation templates.

    3. Create a catchy header image of a right size

    This item is very important. The image in a header will be shown in the LinkedIn feeds as you post will be going viral.

    Here’s the header image from my article:

    Make sure you’ve used 2:1 aspect ratio. It is the best fit for LinkedIn.

    Now this header and title will show up in the feeds of your connections. As people will comment on your post, it will appear in the feeds of their connections as well.

    That is how it typically looks:

    4. Outline “terms and conditions”

    In your article, you need to outline some simple rules to follow in order to get a freebie.

    I added the instructions right below the title line:

    Pretty straight to the point.

    You can add such an instruction to any place (or even places) of your post, where it will be instantly visible.

    Now attention here! The first part of this thesis instruction is what makes this post potentially go viral. This is where you ask people to comment on the post.

    As you understand, people can download the freebie without commenting or sharing the post. However, since you are giving something away for free, you have a right to ask for something in exchange.

    With the results of Ellen Langer’s “Copy machine study” in mind, you can even directly explain WHY one should write “Yes” in comments:

    Also you’re not limited to LinkedIn only. Here’s a nice example of a similar campaign on Facebook:

    It’s up to you to decide how pushy you want to be.

    Writing things like “Comment ‘Yes’ to be whitelisted” may increase the number of comments, but that would be a bold manipulation.

    This may also backfire by scaring away commenters who are averse to such tricks.

    The 3 obvious options for what you might ask are likes, comments, and shares.
    All of them will appear in the LinkedIn feeds. However, comments are the most interesting.

    Commenting takes more effort than clicking the like button, but you’re just asking to write 3 letters “Yes.” That’s really easy.

    This will start a chain reaction of “Yes what?” on LinkedIn. And that’s exactly what you need!

    Although a like or share are good options as well.

    As we’re setting sights on email subscribers as leads, your instruction must also contain a link to a page with an opt-in form.

    5. Set up a landing page with an opt-in form

    The easiest way to get a landing page with an opt-in form on it is to use LeadPages service.

    As a startup may not be ready to invest into a paid tool. So you can easily use MailChimp’s Form Builder. It’s free before you get 2,000 subscribers. And if you have a WordPress powered website, there is a bunch of plugins that can help you with that.

    Here is my opt-in form. It only has an email address field with no need to fill in your name:

    This makes the subscription process faster and easier.

    I recommend you to use a “double opt-in” route for your new subscribers and send them an email with a confirmation link. This will decrease the number of signups but increase the quality of emails, sifting out the fakes.

    Once they click the link to confirm their email address, you will deliver them their freebie.

    Make sure the files you are sending are not too large. Put them into a single .zip folder if there are more than one.

    6. Publish your article

    An article on LinkedIn will be visible to all your connections and followers. Before you publish it, make sure that you set the header image to wide mode.

    That’s all for the setup.

    Getting Your First 1,000 Comments

    Now, once I launched the campaign, I didn’t sit back and wait for the comments to start pouring in. To get the viral effect, you need at least 1,000 comments.

    But how do you get them?

    You have to promote your article a bit:

    1. Share your article on your own LinkedIn profile.

    That’s the basic step to start a chain reaction.

    2. Share the LinkedIn article (not the page with the signup form) on every social account you have.

    LinkedIn has analytics to show you where people came from to your article. At first, my visitors were coming from Facebook, and then switched to LinkedIn when the campaign was well under way.

    Monitor where your audience is coming from in the beginning, and double down on that channel.

    3. Reply to the comments.

    There will be commenters wondering if this is a scam. Reply to them and let them know that you are really doing a free giveaway.

    4. Email your existing subscribers.

    You might think it makes no sense to get email addresses from people who are already subscribed to you. But the virality of your campaign is not about emails, it’s about comments, likes, and, as a result — shares.

    Your email subscribers are the ones who already know you and trust you. They are more likely to help you spread the word.

    Editor’s note
    You can also invest some money in Facebook Ads to give your article an initial acceleration.

    Managing the Campaign

    Once your campaign turns into a viral loop, you will need to help your new subscribers.

    This was a discovery for me, but it turns out that even sending something as simple as a zipped folder will generate hundreds of emails asking for help.

    Here’s what you can do to make your life easier:

    1. Preempt misunderstanding by telling people upfront how and when they will get their freebie files.
    2. Since you are sharing intellectual property, include a license into the .zip folder. Specify whether your files are free for personal and commercial use.
    3. Give specific instructions. For example, a few dozen people emailed me for help because the .zip file was not opening in PowerPoint. That’s when I updated my article to tell them in advance that have to unzip it first.

    Campaign Expenses

    The LinkedIn part of this campaign is free. However, someone has to send those confirmation emails and store the subscribers. There are great premium solutions for that, including Aweber, GetResponse, Ontraport, ConvertKit, and many other.

    But the free MailChimp “New Business” account will also do before you get the first 2k subscribers (you’ll need a paid account beyond this point). You’ll just have to spend some time setting up a custom “Thank you for subscribing” page with a link to your freebie.

    Will this Growth Hack Work For You?

    I can’t guarantee 76,000 new email addresses in your list. I don’t know anything about your business. However, there are things in this concept that don’t depend on a niche:

    1. People like free stuff. If you make a valuable thing and give it away for free, it will be hard to resist. So make something people really want. And make it good.
    2. Commenting spreads your post across LinkedIn. From your connections to connection’s connections. So if 100 people comment, considering that 55% of LinkedIn users have 500+ connections, your post will be visible in at least 50,000 feeds.

    Trust me, 76k subscribers is not a limit!

    Final Words

    Overall, the quality of leads I’m getting from LinkedIn is high. Yes, I’m still getting new email subscribers, although I published this article around a month and a half ago.

    With this viral loop I haven’t just built my email list. I’ve been also getting new leads through LinkedIn messages, and my connections grew from 6,000 to over 8,000.

    This campaign was so successful for me because I run an infographic maker company, and quite a few customers of mine use infographics in presentations. There is a direct connection between what I give away and what I sell. So when you design your campaign, think of how your giveaway relates to your niche.

    Over to you

    How do you like this growth hack? Do you think you could also make use of it? Or maybe you already did?

    Do let me know in comments!

    Anna Vital

    Anna is an infographic designer. She publishes and teaches how to create infographics to maximize traffic. Anna is also a founder of Adioma, the simplest infographic tool for narrative data.

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    • Albert Tan

      Wow, I could not believe it at first glance when Tim sent an email informing about this case study.

      This really opened my eyes. Strategy and method is simple …got to get back to Linkedin to do some work now.

    • Nice one Tim, several people already using this strategy I believe, but its really worth trying. Thanks.

    • This may enable you to get subscribers, but unless it’s niche, those subscribers won’t be quality subscribers. Unless your future content or offers are in line with the download, you could have a lot of bounces, unsubscribes, or worse…spam reports!

      • Anna Vital

        Justin, yes this will only work if your freebie is closely related to what you sell. As far as bounces, MailChimp’s double opt-in took care of that, so I have very few. The first email I sent out to a part of my new list got 59% open rate. The unsubscribe rate was 2%

        • yogizoli

          Hi Anna, great results, great app, great article, thanks! I have 2 questions: does it mean that you had 76K emails with double opt-in confirmed? Is there any difference in what you shared on LinkedIn and FB? Thanks

          • Anna Vital

            Hi, Yes, I got 76K email with the double opt-in, meaning everyone who signup up had to open an email and click a link to confirm their email address. I didn’t have to do double opt-in, but this way I would have more real emails. I would get more without the double opt-in though. On Facebook I shared a link to the Linkedin article. At first I had more traffic from Facebook going to this article than from Linkedin itself, but that changed quickly.

      • Why do you think so?

      • Nick Martin

        We’re one of the businesses that have used this technique that Anna links to. You’re right Justin that the quality of the subscribers can be a problem as people who like free stuff tend to be much harder to convert to paying later. Another thing to watch is your service provider costs. If you’re paying for a service like Aweber or Mailchimp that’s another $250+ per month you’ll be paying out for 50,000 more subscribers. 50,000 high quality leads would be great but that’s not been our experience.

        • Anna Vital

          This deserves another article on how to talk to people that signed up for a lead magnet. So far I am in test mode on this. The only thing I can say is that the open rate on the first email after the campaign was 59.2% on a test group of 4,000 random emails.

        • Nick,
          The quality of actual templates make the difference. If people find it useful, you’ll get hight quality leads, even if they are free.
          We spend a lot of efforts, tweaking those templates for PowerPoint and Keynote, supporting backward compatibility and applying our knowledge in information design. Plus support.
          Would love to hear your experience in details.

          • Nick Martin

            When I refer to ‘quality leads’ I’m not talking about open rate of next email. That’s a vanity metric. A quality lead is one that becomes a customer later and as far as I can tell you haven’t got that far with your leads yet. The quality of templates doesn’t have an impact on whether you first get the email address as they haven’t seen your stuff yet. Free or otherwise.

            • People do see the preview of the templates before they download. I agree that open rate is not that closely related to conversion rate, but it does show that people are interested in hearing more from you.

    • Great article, well written. It would be curious to know how many people from those emails, opened/read your next email.

    • Mamoon

      Anna, this is a great piece. I came across something similar to this recently when I shared something on LinkedIn. I didn’t get a comment on a post for a few days and all it took was one comment where I replied and it seems that once that happens, it’s a snowball effect. Which you’ve seen in your case study. I definitely need to try this because it’s definitely something that will definitely be able to build my brand! What are your thoughts on growing this with LinkedIn ads?

      • Anna Vital

        Worth trying growing it with Linkedin ads too. I believe you can get your first $50 free. I haven’t done this yet.

    • Thanks for sharing this Anna, I was thinking about using LinkedIn and I’ll try this. Just to be clear, is there any other reason why someone should comment ‘yes’ on the LinkedIn post apart from you asking for that? That is to say, if they don’t comment, they can still subscribe and get the lead magnet anyway? If that’s the case why do so many people comment? If it were me, I’d probably just click the link, download the lead magnet and forget to comment 🙂

      • If someone comments, then their connections see the post, which produces a snowballing effect…

      • Anna Vital

        Daren, you can see on the post that about 63,000 people commented but I have 91,000 emails by now ( at the time I wrote this article it was 76k). So that means many people did realize they don’t have to comment and got the download anyway. So every 3rd person did the same thing you said you’d do. Now, the more interesting question is why the other 2/3 commented — just because I asked? I am guessing here, but I think many of them also knew they didn’t have to but accepted this as a way to reciprocate. In the article you can see a link to campaign that explained that the yes comment is to help spread the word.

        • Yes Cialdini’s law of reciprocation! You might be right there Anna. Thank you for your reply. That’s a big email list. Congratulations!

    • Yes

    • Hey Anna,

      So simple, but yet so effective. Thank you so much for sharing this, in a very detailed post.

      One question though — how do you filter people who subscribe your the list as well as comment on the post? Or asking for a comment is just a favor, but you will send the template to everyone who subscribe in the email list?

      PS: Love Adioma, big fan of Nama-roopa (using visuals to borrow a space in readers brain space).


      • Anna Vital

        Jaseem, I sent the template to everyone who entered the email, even if they did not comment. It is easier to set up this way. But if you said that, for example, I will email you the slides in one week, then you could match up the commenters name and the name they gave when signing up with email. Asking for both name and last name would decrease the number of signups as well.

        • Understood. We should rather ask comments as a favor, as a good gesture 🙂 Thanks Anna!

          • Anna Vital

            Try it, and see if you get better results with asking for a favor more explicitly. It’s worth testing.

    • VERY BIG Thank you for sharing the valuable experience!
      Comments ROCK too.
      I carefully study the viral loop instrument. My current objective is to do the viral loop on Facebook and I have three freebies that my audience would like to get very much.
      I would appreciate if you link some more examples from Facebook viral loops so that ai study them. Thank you

    • CommonSense501

      The copy machine study is directly taken from Caldini’s legendary Persuasion book: “Influence”. I highly recommend it for anyone who wants to learn the secrets of getting what you want with words.

    • Marcio

      cool! im going to give this a try thank you and congrats.

    • thank you

    • Is this still working?????

      • Anna Vital

        Yes, people are still signing up.

    • KirtiG

      will use this trick on my email newsletter and will see what happen?

    • That was a fantastic article and strategy. Thanks for sharing.

    • Jeremy Poland


    • Brilliant Anna!

    • Great article Anna, thank you!