What I don't get about the idea that Oculus could have sought investment elsewhere - Who do you imagine would have given them similar sums of money without exer

What I don't get about the idea that Oculus could have sought investment elsewhere - Who do you imagine would have given them similar sums of money without exerting pressure and control? There's pretty much no such beast. One thing we know about FB is that Zuckerberg is willing to look at a longer horizon than most investors. It's quite likely FB is among the least pressuring investors they could have found.