Facebook is what we used to call a “walled garden” and now call a silo: a controlled space in which people are allowed to do things that will amuse them while enabling Facebook to monetise their data trails. One network to rule them all. If you wanted a vision of the opposite of the open web, then Facebook is it.
I'm as critical of Facebook as anyone, but I tire of this trope. Facebook is of course a silo, but it's also just a privately-owned app on the open web. In that way it's no different than this here humble weblog, albeit somewhat more popular.