Excellent idea, I see a few issues though.

First, your server is struggling. It took about 20+ seconds to respond just now, FYI.

Second, it's not obvious to me that I can get my money back if something doesn't pan out / get approved by a certain date from the homepage alone. That might make people hesitant to put anything in if they think it might get locked in there forever if the site dies / you take it down / etc.