GrowthBook

A growth loop that looked perfect on a whiteboard completely backfired. Fyxer has a scheduling feature — similar to Calendly. When someone books a meeting, you get a confirmation. Kameron Tanseli's hypothesis: send that booking confirmation and use it to drive recipients back to Fyxer to sign up. Clean viral loop. New users, every time someone schedules. He built it. He shipped it as an experiment. Users pushed back immediately. Fyxer's entire value proposition is reducing inbox noise. And here they were adding a third calendar email — on top of the Google Calendar invite and the Outlook invite people already received. The experiment died fast. But here's the thing — that's exactly what experiments are for. A smart idea that contradicts your core product promise is a liability, not a feature. The experiment caught it before it shipped to everyone and quietly undermined what Fyxer stands for. The best growth teams don't just test what might work. They test what looks great on paper but might be completely wrong. What's the most counterintuitive experiment failure you've seen? 🎙️ Full episode + case study in the first comment 👇 #GrowthEngineering #ProductLedGrowth #ABTesting #Experimentation

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