they think this is something that takes away their privacy but if the casino doesn't do this they run the risk of suffering from abusers, so this is definitely a big problem and in my opinion casinos shouldn't be offering satoshis on faucets , it would be better to give free spin or free bet for active players than to put faucets that will only bring harm to the casino, I honestly don't see any reason for a casino to have a faucet especially when the price of bitcoin rises a lot and the casino cannot get many customers, the casino will just accumulate a lot of losses
But to deter abusers, they can use verification in the form of KYC so they won't verify each account without the casino knowing. That will make them no longer able to abuse anything in the casino because the team will monitor every activity.
But of course, every casino has its own policy, which will be different from other casinos. And they are sure to combat abusers in their casinos by imposing stricter regulations.