Well, if you consider smart contracts and cryptocurrencies of blockchains like for example, the Binance Smart Chain, then you pay mere cents for each bet. That does not sound like a lot to me? So you pay 14 cents and you bet instead of 1 USD, 86 cents. if you want. Seems fair. Even for the poorest among us, that kind of gambling should be affordable. Most bet at least 10 USD so the 14 cent fee won't even be noticable.
Perhaps there can be some sort of bonus system to even out the fees?
Then 1$~ish fee for every 10 bets is still not reasonable no matter what's the amount use to bet. Plus not so many are fond using tokens to play which mostly can only get from swaps or so.
If the gambling website will not implement bitcoin as payment option since the platform is made for smart contract I'm afraid it will be popular as what gambling website in this board.
Of course its reasonable? If you care about your privacy and your wallet not having someone elses hand in it, then you want decentralization. And if you have to pay a dollar for every 10 bets you make, then thats just the price of freedom. Think of it as a fee. And for that fee, nobody can freeze your account or take your funds from you. Seems like a fair bargain to me. And it might make people think a bit harder/carefully on the kind of bets they wish to make.