I'm expressing my feedback which is "make it provably fair". Given how a new bitcoin casino (without provably fairness and usually also without a clue on how to not get trapped w/ doublespending) pops up at the rate of 2 per day, I really cannot be bothered to "It would be easier to garner trust in this specific community (which is small and insignificant in gambling terms) by providing a service to prove the fairness of your bets...just a suggestion"

The issue is it is very hard to tell if a coin flip site actually has 50/50 chances, or 49/51 chances, or 45/55 chances. When there's something that allows everyone to verify their odds and RNG are fair, then there's no reason to not do it short of the development time. I don't think most people realize that you are handling other people's money.