Not sure about the US but in general for me, I have noticed that the crypto casinos accept much higher bets compared to sites like bet365, William hill and others. Not just that, the traditional bookies limit your account much faster.

There are guys involved in shady betting such as rigging matches, arbitrage, etc and they don't want to do it on a traditional casino because of the KYC. This is another reason why they want to use crypto sportsbooks.

You are much likely to get away with a 1 BTC bet on stake than a $35k bet on bet365 if you are into prof stuff.