I'm sure that a pervasive predatory corporate development department backed by a cash-heavy company could reel in virtually all AAA PC games, but the long tail not so much. And the funny thing is, AAA has been a huge disappointment for gamers and I imagine investors as well over the last years, compared to its golden days.
Compare to say "owning your social graph" like Facebook, that's something that's much more robust. A good messaging platform doesn't take over the world in a few weeks like an indie game (almost) can, so Facebook has plenty time to acquire it or copy/steal their features.
