In my case nothing special. I've already gambled to help my family to pay monthly bills and thank God I achieved success on that.
In other situations, I've ordered some pizza or restaurant food and bought virtual games. But usually what I most like doing with gambling profit is to save it and invest to keep growing crypto holdings.
That still counts as you managed to spend it to help your family from paying those monthly bills and bought something with it that you could use on like daily-weekly basis.
In my case, I usually got small winnings and I haven't won big enough to consider buying expensive things but if I'm lucky enough then I'd surely spend it wisely and buy something that could be useful and invest the rest in my existing portfolio.