Hell, they should either kill the faucet altogether and leave everything else intact, or they should significantly increase the minimum withdrawal amount to something like 1 mBTC. Can't have transaction fees eating away the reserves at each withdrawal.
Withdrawals should go through a strict procedure to ensure their legitimacy before being approved.
Maybe to have users' accounts organized by ratings or flags could help, just like those accounts which don't have a captcha completion required in order to claim the reward from the faucet.
These accounts could be white flagged, meaning the withdrawal process could happen faster, without many security protocols, while new accounts from users who only make use of the faucet should be yellow flagged or something like that, going through stricter processes in order to withdraw their money from the platform.
People who deposit considerable amounts of money on the platform for investment or gambling purposes are less likely to cheat, because they know they can lose their deposits if they do so.