might want to check out peerplays too...its the next graphene chain (bitshares and steem are 1st and 2nd).
It is going to be a platform for not only game betting, but also for games to use the blockchain for provable fairness.

Going to be stunning. peerplays even has its own tag on steemit :)

P.S. I like LBRY too...though i'm not sure mining will allow it to scale as it needs to. Graphene really is amazing tech. Steemit already has like 2x the total tx of BOTH ethereums combined, for instance. So tell me how valuable these chains will be in the coming 5-10 years ;)