Tinder's First Startup Pitch Deck shows Tinder thought it would monetize with in-app purchases and a freemium model.
Adam Rifkin stashed this in Monetization
Tinder thought it'd monetize with in-app purchases and a freemium model, where the first few matches cost no money and every match after costs $1. Tinder also toyed with the idea of promoted profiles. Tinder hasn't implemented any of these payment features.