I have watching this thread even though I didn't replied before, but since he left me with negative feedback without contact me first, so he's forcing me to reply in this thread.

If you have suspect he's using bot activities, why you let him to withdraw his money? while the third attempt you don't want to let him to withdraw, if you're believe your system are good enough to detect an abusers, don't let him to withdraw!

The images you provided above didn't tell anything if he was abusing your faucet, more over you didn't even stated it on your TOS!

However the tag have revised from negative to neutral since the @OP is inactive and there's no update anymore from his side.