I have a simple idea for a website that is almost gambling but maybe not quite. It is a game where you can reserve numbers for a price of 0.1 BTC or 1 BTC for bigger prizes. For example, I could spend 0.5 BTC and reserve 1, 3, 10, 14 and 30. Then if one of these is the smallest number that is reserved by only one person, I win and get other people's bets minus the site's commission.
I can pay or offer a percentage of the profits for making this. This concept has been tested and is very profitable, it is more fun to play since it is not just a randomly chosen person who wins. Please post in this thread how much you would charge.