Business Models & Unit Economics

Ten Million Chats, Zero Dollars

Monetize a viral free product whose marginal costs are real: every free user burns compute. Learn how paywall strictness trades conversion against the virality and goodwill that fuel growth.

Your AI companion app is a word-of-mouth rocket: users send millions of messages a month and tell all their friends. There's just one problem — every one of those messages costs you GPU money, and revenue is exactly $0.

Each month you choose the paywall design, the subscription price, and the model quality tier (better models delight users but cost more per message). Paywalls convert — and they also slow the viral loop that got you here. Reach $15,000 in monthly profit before the compute bills drain the account.

12 months on the clock. Initial conditions are randomized.