Quick suggestion. I really like the 'anybet' option, but it can be off-putting to see that if I place the first bet - I'd make a small loss even if I win (site fees). I know that's not true, you have this explained in FAQ:
Can the winning outcome loose coins if the losing side has much smaller bet amount?
NO! Unlike our competitors, where even if you bet on a correct outcome you might still lose money, at FortuneJack you don't lose anything in such case. In our competitor's cases, if the winning side bets 10,000BTC and the losing side bets 1 BTC, winning side still looses 100BTC in fees for maximum upside of 1BTC. In OUR case winning side does NOT lose anything and bets are fully compensated. So the winning side would get their 10,000 BTC back in this case.
You should make it clear in the bet calculator. So if no other bets are placed, 1BTC should return 1BTC (not 0.99071500).
Also, it would be a good thing to reduce the min bet amount, since your site is new, many people would want to test it first with small bets.
ps. Thanks for the bug bounty you've sent me yesterday.