Well, Primedice is the best site I have ever know, if you play there, so many wins can you get even more in almost every month Primedice hold a contest that could make members get many bitcoin, but if you do not want to try Primedice, maybe you should look for better than that, and you might try playing in SatoshiGames.io 
Not every month. They are running contests weekly and one of the best feature i love is the forum reward for contribution. It is far better than faucet. Moreover, there are daily trivia competitions, chat games, rains and more.