It depends on your definition of "done to death." There are definitely solution spaces where it is impossible to be profitable right now. Especially if two tec

It depends on your definition of "done to death." There are definitely solution spaces where it is impossible to be profitable right now. Especially if two tech giants (FB/Google) are competing in that space - they likely can't even profit in the space because if their competition with each other. You also have to consider traction. Facebook is not the paragon of social networks (in fact they're a bit ass), but no one is going to pull the reins from them while they continue to have as much user traction.