> You're going to get demolished if you start bouncing gambling debt on a credit card.

If you do not have assets or high income, you can just ignore debt and it will drop off you credit report after 7 years. They can try to sue you (unlikely for <$5k debts) and then try to garnish wages (max 25% of aftertax income) but many states outright prohibit garnishment for consumer debts (like Texas) or limit it (like CA - just show that you have high living expenses to avoid garnishment).

Overall much better options that kneecaps.

Most of those gambling sites don't have merchant accounts and aren't able to accept credit card payments directly. Customers take out cash advances or buy cryptocurrency through various shady intermediaries, then transfer the assets.