As a result of numerous trials and error, we found the most ideal way to deal with multiple accounts and abusing faucet - adding PLAY MONEY currency and the ability to use faucet after first deposit.
Nice decision, even though IMO other options such as enable withdraw after first deposit or high minimum withdraw, so abuser will lose their money from faucet before reach minimum withdraw.
Still, it's more effective than block user who use VPN, Proxy or Tor because privacy/security concern, not abusing faucet/break other rules.
He did it well already, by requiring a deposit before players are able to claim the faucet is better than your suggestion which is about high minimum withdraw because it will affect other players who are really playing with their own deposit unless he has two different minimum withdrawals (for non deposit users and for deposit users).
If the reason is because abuser will lose their balance before reaching the minimum withdraw, then abusers will try again and again if there is still a chance to abuse the faucet easily. Real abusers wont give up just because they fails to reach minimum withdrawal few times.
Yeah, you are absolutely right!