Good site and idea. It just makes me laugh when you say there is not house edge. Your house edge is the 1% withdraw fee.
Same as winning 0.99 on a 50/50 bet with 1 credit = 1.99 or you get 2 and withdraw 1.99 either way you get 1.99 form betting 1.
Technically, you are playing with no house edge. With a 1% edge, you'd be expected to lose 1% of your bet, every time. If you play 10 games with 1 BTC, with a house edge, you'd be expected to lose 0.1 BTC. With a withdraw fee, your expected value is 0 until you withdraw, but by then you should have made profit if you are withdrawing. You won't lose more over the long term.