Rahul Vorra discusses how his background in game design, not gamification, shaped Superhuman's inherently fun features, like the 'squishy affordances' of its time autocompleter. He deliberately created a cult product by controlling onboarding to ensure only happy users, starting with just five people per week and scaling slowly. This strategy, combined with premium pricing and selective onboarding of influential users, built high retention and word-of-mouth virality. Vorra explains how Superhuman used the 'very disappointed' metric to measure and improve product-market fit through market resegmentation, raising their retention from 22% to 58%. He advises first-time founders to define a clear strategy, be first-principled, and raise prices annually.