That's not sustainable. Facebook is not buying these companies because they are adhering to some kind of moral code. Facebook is a corporation like any other that needs to justify things to investors and analysts. That's the model as far as I know. So if they're pouring money into Oculus and its ecosystem then surely they expect to get something out of it. Ultimately they control the technology and as a profit driven corporation they are going to drive the technology in the direction of profits. They are not going to drive it in the direction of sustainability. Facebook is not in this to break even and they are not going to subsidize more benevolent but unprofitable uses of the technologies they acquire.

Like I said in my original comment. I don't think this is a good or bad thing. My philosophical stance on technology is different and I'd much rather see a sustainable ecosystem of technologists that are not always driven by profits and quick payoffs from acquisitions.