You get to keep everything that you achieve in your own head, like "having fun" or whatever satisfaction you derive from what you do on those sites. You don't get to take out anything you manage to "create" their though, like your level and points. So except for what you manage to do in your own head it's much-input-no-output, a black hole box that swallows all your efforts and keeps them without giving back. Again, speaking about the "game", not about your own satisfaction e.g. for helping others.
The game is used to pretend to you the rewards are higher, but in order realize that promise you have to stay in the game world because the rewards you earn cannot be taken out.
So yes, within the context of those sites it is "real".