Everyone wants to build a viral product. They talk about it in boardrooms and coffee shops from San Francisco to Shanghai. They draw neat little loops on whiteboards, showing how one user magically turns into two, then four, then a million. It all looks so clean, so predictable. So why does it almost never work out that way?
I’m Sahin Boydas, and I’ve been building companies in Silicon Valley for over a decade. I’ve had a couple of successful exits—RemoteTeam, which was acquired by Gusto, and MovieLaLa, which Gfycat bought. I’ve also been fortunate enough to be an early investor in some incredible companies like Anthropic, OpenAI, and Scale AI. I’ve seen growth from every angle. And I’m here to tell you that the clean, simple viral loop is a myth. The truth is a lot messier, more frustrating, and ultimately, more interesting.
I’m pulling back the curtain on our journey to one million users at MovieLaLa. It wasn’t a smooth ride. We made mistakes that almost killed the company. We chased vanity metrics. We burned through cash. But we also uncovered some surprising truths about what actually makes a product grow. This isn’t another theoretical post about viral mechanics. This is a story from the trenches, with the data and the scars to prove it.
The 100,000 User Illusion
I remember the early days at MovieLaLa like it was yesterday. We were obsessed with our user acquisition number. We launched on a few tech blogs, got some decent press, and the sign-ups started rolling in. Within a few months, we hit 100,000 registered users. We were high-fiving each other, popping champagne, and feeling like we had cracked the code. We thought we were on the verge of something huge.
But here’s the thing we weren’t paying enough attention to: our retention was terrible. People would sign up, poke around for a few minutes, and then disappear forever. Our weekly active users were a fraction of our total user base. We had a leaky bucket, and we were celebrating filling it with a firehose. We were so focused on the top of the funnel—the shiny acquisition number—that we completely ignored the foundation of the business.
Our viral coefficient, or 'k-factor', was technically above 1.0 on paper. For every user who signed up, they'd invite, on average, 1.2 other people. It looked great in our pitch decks. But the invites were low-quality. People were inviting their friends to get a small reward, not because they genuinely loved the product. The new users who came in from these invites were even less engaged than the ones who found us through press. We were building a house of cards.
The Wake-Up Call
I thought I knew everything about retention strategies. Then I made a mistake that nearly tanked my company. The wake-up call came during a board meeting. We were presenting our beautiful growth charts, showing the ever-increasing user count. One of our board members, a seasoned investor who had seen it all, wasn't impressed. He cut right to the chase: "Your numbers are vanity. Show me your cohort analysis."
We scrambled to pull up the data. And there it was, in stark, undeniable detail. Our cohorts were flatlining after the first week. Users were churning out almost as fast as we could acquire them. The company was a ghost town. That was our "oh shit" moment. We had been so caught up in the Silicon Valley hype of "growth at all costs" that we had lost sight of the most important thing: building a product that people actually wanted to use.
That board meeting was a turning point for us. We made a painful decision: we were going to stop all of our marketing spend. No more press outreach, no more paid acquisition, no more incentivized invites. We were going to focus 100% of our energy on our existing users. We needed to fix the leaky bucket before we could even think about turning the firehose back on.
From Viral Loops to Community Loops
We started by talking to our users. I mean, really talking to them. We emailed every single person who had signed up in the last month. We set up dozens of phone calls. We invited our most active users to our office for lunch. We wanted to understand who they were, why they signed up, and why they weren't coming back.
It was humbling. We heard a lot of things we didn't want to hear. The product was confusing. The value proposition wasn't clear. It was missing key features. But we also found a small, passionate group of users who loved what we were doing. They were the ones who were sticking around despite all the flaws. They were our true fans.
We decided to build the company around them. We created a private Slack group for our top users. We gave them early access to new features. We asked for their feedback on everything, from button colors to our product roadmap. We stopped thinking of them as users and started thinking of them as co-builders. This wasn't just about customer support; it was about making them part of the team. We were building a community, not just a user base.
The Product We Built Together
Our conversations with our core community revealed a fundamental disconnect. We thought we were building a tool for discovering new movies. They wanted a way to track the movies they wanted to watch and share that with their close friends. It was a subtle but profound shift in perspective. It wasn't about broadcasting to the world; it was about intimate, trusted recommendations.
Based on this, we made three big changes:
The Watchlist became the core of the product. We had a watchlist feature before, but it was buried. We redesigned the entire user experience around it. It was the first thing you saw when you logged in. We made it incredibly easy to add movies to your list, sort it, and share it. We saw engagement with this feature increase by over 300% in the first month after the redesign.
We killed the global activity feed. We had a feed that showed what everyone on the platform was watching. It was noisy and impersonal. Our users told us they didn't care what a stranger in another country thought of a movie. They cared about what their friends were excited about. We replaced the global feed with a simple, private feed that only showed activity from the people you were connected to. This change alone doubled our weekly retention rate for new users.
We focused on "social objects." Instead of just letting people "like" a movie, we created more meaningful ways to interact. We added a feature that let you and a friend "co-watch" a movie, even if you were in different places. We built a recommendation engine that was based on the tastes of your social circle, not just your own. We wanted to create things that people would talk about, both on and off the platform.
These weren't just small tweaks. We were fundamentally rethinking the purpose of our product. And it was working. Our retention numbers started to climb. Our users were more engaged. And something surprising started to happen: we started to grow again. But this time, it was different.
The Unsexy, Sustainable Growth
Our growth was no longer explosive. It was slow, steady, and organic. We weren't getting featured on TechCrunch anymore. But our internal metrics were telling a completely different story. Our weekly active users were growing consistently, week over week. Our cohort retention curves were finally smiling. We had found product-market fit.
The irony is that our viral coefficient—the number we had been so obsessed with—actually went down. It dropped from 1.2 to around 0.4. But the quality of the new users was infinitely higher. The people who were now joining MovieLaLa were coming from a genuine recommendation from a friend who loved the product. They came in with context and intent. Our week-one retention for these new, organically acquired users was over 60%, compared to the 15% we were seeing from our old, incentivized invites.
This is the truth about viral marketing that nobody talks about. It's not about engineering a perfect loop. It's about building a product that people love so much that they can't help but tell their friends about it. The growth is a byproduct of the value you create, not the other way around. It's less of a viral loop and more of a community-led growth engine. It's slower, it's harder, and it's a lot less glamorous. But it's real.
My Advice: Forget Viral, Focus on Value
So, what's the takeaway for you, the founder who is grinding away on your own product? Here's my advice:
- Stop obsessing over your k-factor. It's a seductive but dangerous metric. Focus on your cohort retention instead. Are people sticking around? If not, nothing else matters.
- Talk to your users until you're sick of it. Find your true fans and build the product for them. They will be your evangelists. They will be your moat.
- Build social objects, not just features. Give your users something to talk about. Create shared experiences. The most powerful marketing is a product that is inherently social.
- Be patient. Real, sustainable growth takes time. It's a marathon, not a sprint. Don't get distracted by the vanity metrics and the overnight success stories. Focus on building a product that people love, and the rest will follow.
Building a company is one of the hardest things you can do. It's a rollercoaster of emotions, a constant battle against the odds. But if you focus on creating real value for a core group of users, you can build something that lasts. That's the truth about viral marketing. It was never about the loop. It was always about the people.
Frequently Asked Questions
How can I apply this thinking to my own situation?
Start by identifying the core principle behind the opinion, not the specific example. Then ask yourself: does this principle apply to my context? If yes, test it in a small, low-risk way before going all in.
How has this view evolved over time?
My thinking on most topics has changed significantly over the years. Early in my career, I held many conventional views that experience proved wrong. I try to update my beliefs when the evidence changes.
Do all experts agree with this view?
No, and that's fine. The best ideas in business are often contrarian. I share my perspective based on my experience and data, but I encourage you to seek out opposing viewpoints and form your own conclusions.
What's the most common pushback you get on this?
People often push back by citing exceptions or edge cases. And they're usually right that exceptions exist. But building a strategy around exceptions rather than patterns is a losing game for most founders.