Well this has only been promoted for like 3 weeks, so give it a minute. There's a chicken or egg problem, if no one buys into the dream before it's reality then it will fail.
It doesn't take half a million dollars to come up with one single actual demoable application that does something twitter won't or can't do. The point of this thing is supposed to be better apps. Fine, show me one, and I'll pay $50 to see more.