An advertising model isn't interchangeable with a subscription one, besides the fact that people won't pay for everything because not everything is worth paying

An advertising model isn't interchangeable with a subscription one, besides the fact that people won't pay for everything because not everything is worth paying for. Ads help a thousand flowers bloom, startups can experiment and throw ideas out there to see what sticks without requiring the user to pay to discover and interact with their creations, the ad model is very much an innovation model. Many of the services available today won’t exist unless they are free, and are used by many users which and the usage patterns are collected as feedback to improve and evolve said services.