Each bet is provably fair, you can verify them yourself. We will be looking into making a tool that automatically verifies all our daily bets for users.
it may be provably fair, but im thinking it has something to do with the allocation of the server seeds roll after each roll
on a good minute, you can get a roll of >65 3 times in a row, and then the next second, you might get <30 5 times in a row before resuming back to >50 just once, and then it goes < 40 few times in a row
this actually makes the bet of 50.50 (50%) chance of winning doesnt seems likely