[jp555]

That's just obtuse. It’s clearly not selling user data at all. When I buy FB ads I cannot not get any user data. I can pick they type of user I want to see my advert, but I cannot know who they are.

If you have a FB account you can try this and see for yourself right now for a few bucks.

But maybe I'm wrong. Can tell me how they do sell user data?

[trutannus]

You're correct. If they sold the data, then they would sell themselves out of their own market.