I think it doesn't concern every customer anymore on what they did on that charge of fee. I think it isn't that huge compare to what we've experienced in the past when Bitcoin is getting too volatile. If it concerns you that much there are other sportsbooks you can try that doesn't charge or use another mode of transfer like others using layer 2 solution or other chains like Solana (I don't know if there are much information regarding sites that using Solana chain).