Would you mind on sharing out on what FTX you've been talking on? Sorry as im not aware about it but normally exchange does really have free transfers in between accounts but for other external
transfer then I cant see anyone who do make it for free on every single day which I can say for it to be generous.
I won't say they are generous, but competitive.
https://help.ftx.com/hc/en-us/articles/360034865571-Blockchain-Deposits-and-Withdrawals"
Small BTC withdrawal fees: BTC withdrawals > 0.01 BTC are free. BTC withdrawals < 0.01 BTC are charged withdrawal fees after your first free one per day." - You can find it on that page.
Well, this is just normal because there are people do make use whatever on what they do like or been preferred.
https://withdrawalfees.com/coins/bitcoinDo you know about the above mentioned website?
You must visit it if you need more alternatives, if BTC is all you need to gamble and need it after paying cheapest fees.