TheQuin is currently focusing on fraud prevention across our multiple properties
We've been there.
It's impossible to stop fraudulent traffic when you don't change the way the site operates.
We were criticized when we changed the hourly roll to a daily roll but that's what saved our faucets.
If you want to overcome this fraudulent activity (and don't end up like freedoge.co.in had to shut down) you need to start changing your business model. First of all paying 3 sats at minimum roll is a pure suicide and doing it on a hourly basis is a disaster waiting to happen.
Change your business model first, then worry about how to stop the remaining fraudulent activity. The change itself will deter fraudsters from draining your Bitcoin reserves.
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.
I don't know about the rest of you guys, but I've always known that bots were exploiting the faucet, and if a sophisticated faucet exploit across hundreds of accounts followed by a normal withdrawal is what caused the massive drain in reserves, then Freebitcoin needs to up their security before I can trust them with money again.
It's a shame because I used to advertise for this casino back in the day.