Well, winning some bitcoins in an online gambling with just only in a faucet requires time and I can't guarantee it that you would win some big profit on that. If you really need to have some free bitcoin that you don't want to wait that long you should choose Primedice but it only have a required faucet you can claim in a day. There are many sites that you don't have to wait to get some faucet but only limited in a day and there is sites that unlimited like freebitco.in but you really need to wait that in an hour and if you really want to win it's a matter of a luck.