Hey Lyco. I'm not sure how your "exploit" is a problem. I just checked, and most other BTC dice site's with a faucet, including PrimeDice, and Rollin.io, uses the exact same captcha, and similar static timer. You can't make another claim within 3 minutes of the previous.

If it's so easy to turn 0.00000500 into 0.049, then why do you need to abuse the faucet anyway? From that 0.049 you could make close to 10,000 500 whole satoshi bets.

I could understand if it was bet>instant claim>bet repeat etc. but you can't do that, you have to wait 3 minutes before you can claim again.