Also Duckdice has build-in faucet feature. It enables you to switch to faucet mode (account), than you have to win in the tictactoe game against opponent and free coins are yours.
Although these can be transfered to main account once you reach minimum cashout requirment. And since you cannot claim another free coins with non-zero balance, the only option for you is to gamble your way up to the minimum cashout requirement.
And you’re very unlikely to succeed with that.
So if you’re looking for acquiring free bitcoin, DuckDice isn’t optimal for you.
They offers dice, you can deposit with Bitcoin, Ripple, Ethereum and other cryptocurrencies. Claim many bonuses and participate in races or lottery.