Okay, now.
I need you guys (FAUCET OWNERS) give me suggestions on what else you'd like to see on faucethub.
Reverse/hold payment button for every claim/btc wallet address - reason: when we suspecting a bot or another sh*t
Not sure if that would be wise to be honest. There would be a lot of faucet owners who'd abuse this

Okay, now.
I need you guys (FAUCET OWNERS) give me suggestions on what else you'd like to see on faucethub.
"Auto chargeback" to addresses that was flagged like bot
If user withdrew those bitcoins, who'd pay back?
EDIT: Who decides if the user is a bot? This can be heavily abused, needs a lot of thinking
there can be 2 solutions:
1) - global IP / BTC address blacklist (on your mysql DB) that will automatically reverse the payment - faucet owners can suggest them - more suggestions = biggest chance that is not a false positive
2) faucet owners will "complain" to you (of course with some proof) and you will decide if it's a suspicious user/IP or not. If yes, you will update the blacklist from first point.
I know it's a tons of extra work for you - but with that you can ask a higher fee, faucet owners will definitely accept that. Also, you will become an owner of unique blacklist that you can share for some money to 3rd parties