My impression is that the DAO people are early adopters mostly from the Ethereum Foundation itself, so the "150 million dollars" number that is bandied about would be mostly paper profits from a much smaller investment. It doesn't mean they ever had 150 million dollars in actual money between them, or any practical way to get it.
Edit: If this is not how it is, I'd be interested to know who is putting money into the DAO, sociologically speaking. I hope nobody's investing their life savings in it.