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Fishkin pushes back on the fuzzy way founders talk about fit and argues for tracking concrete behaviors like usage, retention, and referrals instead. It pairs well with your question because it insists the truth is in what people do repeatedly, not in a moment of sign-up. A healthy contrarian read to keep you honest.
Product-Market Fit is a Broken Concept. There's a Better Way.
From SparkToro by Rand Fishkin 12 min read
- Judge demand by repeated behavior over time, not a single signup event
- Referrals and organic return visits are stronger signals than stated interest
- Vague 'do we have fit' debates dissolve when you watch real usage data
