Richard Branson is a very rich man because he figures out what we want before we do. That's one of the secrets to entrepreneurship and becoming a billionaire. Another secret is use someone else's money as to minimize risk.
Richard Branson also knows what DARPA wants before they want it. He has built an underwater plane. He still has to get his design to fly out of water, but it seems that if he wants he has a step on the DARPA competition as he has already partially resolved the weight issue. Of course, his opportunity costs are such that the prize money is not likely worthwhile.