Yes, I have used FTX exchange a few times and one withdrawal per day was free. However, I have never withdrawn crypto from that exchange to a casino. But to my personal wallet.
Let's suppose you have funds on FTX, now that you are unable to withdraw, will you halt gambling for the time being and how will you survive this time?
I never hold my funds on an exchange so I don't have any issues. Yes, some people keep their funds on exchanges due to staking or for other reasons. This is a lesson for them to never hold their funds on a centralized exchange in future.