Forgive me for not reading through the entire thread and I might have missed a discussion regarding this.  About that issue where clicking the button that reveals the hash and them possibly doing "whatever the fuck they want" with the hash before you click the button.  The hash generated and viewed after you click the button should automatically pertain to all previous rolls as long as you haven't changed the hash, should it not?  A verifier would prove the roll numbers match up.  I don't see where OP's logic is in that argument, unless he just isn't aware of how it actually works.  Full disclosure: I've never played at 99dice.