If talking about my biggest win, it should be a win of 1mBTC from my faucet payout at Primedice, that is completely zero cost but a return
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
Today, I am sticking to Dadice, because their jackpot system even gives a higher expected value than the bet (if you don't know what is expected value, Google 'Expected Value'. If you don't want to Google yourself, then
lmgtfy).