[cercatrova]

> For example, FB should pay every single user it makes ad money from, some % of the revenue their data brings them.

Why would FB do that when its users happily do that for free? There's no incentive for them to pay users. You could say users would proffer more detailed data, but I doubt it, most people's data is not conscious, it's the unconscious actions that are valuable, such as going to a store and looking at various items.