To be honest, I'm not seeing the difference between uber and Amazon. It just feels like you're giving your interpretation of the situation rather than the reality.

You day this about uber > It lets people make money from their car.

I think the implicit assumption above is that cars don't make money traditionally.

Same can be said amazon: "It let's you make (more) money from the things you're already selling"

Uber is also a middle man between ride-hailer(user) and driver, the same way Amazon is a middle man between buyer and seller.

Are the examples incorrect because they're way too similar (platform plays) or is my understanding incorrect (that they're very similar)? I'll be happy if somebody could take a few minutes to explain