🧠 Engineering Culture

16 Days of a Revenue-Printing Bug: What It Taught Us About User Defaults

Bugs kill revenue. Or do they? This one delivered a 73% uplift—and proved a radical truth about how users actually choose.

DevTools Feed Apr 03, 2026 3 min read

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⚡ Key Takeaways

A 16-day production bug defaulting to premium plans boosted revenue 73%, outperforming months of planned features.
Don't auto-fix: SQL dives revealed user preference for premium when prompted first—no tricks needed.
Simple code (3-line if-statement) with flags scaled the insight; defaults are underrated decision drivers.

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#A/B experiments #production bugs #revenue optimization #user defaults

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Originally reported by dev.to