Hook Model

Biological Parallel

The hook model (trigger → action → variable reward → investment) mirrors the foraging loop: hunger signal → search → unpredictable food find → cache investment that creates future triggers. This isn't a business model—it's how biology creates compulsive behavior loops. Each investment (cached nuts, app data, profile customization) increases switching costs and triggers future engagement. Apps don't create addictive loops; they hijack ones that evolved to keep animals alive in uncertain environments.