Quite interesting, but isn't it risky on your part? you are like financing or running your own gambling platform here without a license. One of your possible bettors could report you to the authorities and they can witness against you, I know there's an opportunity, but look at the risk also.
It will only happen if OP will do some
sh*t against them
e.g no payment, run away with the funds, etc.
As far as those bettors are concern, surely they know what OP is offering to them. It's just that they don't know how crypto betting works.
I don't see how OP will able to profit from doing that since he needs to show betslips for references so he can't fake the odds. The only way to get profit is to get some percentage to his bettors' winnings. For how much, I won't bother to know it.