A pivot method: when a broader product isn't gaining traction, honestly examine what people are actually doing with it rather than defending the original vision, then study that narrower sub-category's incumbents for a differentiation angle (e.g., running a Product Strategy Grid exercise against them). Instagram's founders used this to pivot from their broader check-in app Bourbn/Burbn to photo sharing once usage data showed that was the only feature people actually used.
Basis of Instagram's 2010 Strategy (Performance + Delighter Case Study).
Apply: When a product stalls, analyze real usage patterns (not stated intent or the founding vision) to find the sub-behavior with pull, then treat that narrower category as the new competitive set.