Your game is shit. If I was shooting for a 2x multiplier, I would be paying a 50% house edge, assuming it makes it there. You should lower it to at least 0.05, so the house edge isn't that bad. Sure, you make less money, but you can't expect people to gamble against a 50% edge. If you play on bustabit, I believe you are fighting only a 1% edge compared to your whopping 50%.
Is it really that high ? How does that work ? How can it be so ? That means you don't win almost double on a 2x you would make only 50% why anyone would want to play in a casino like that is beyond me. This game isn't even like bustabit.