You can also use #Decent - a blockchain based on Graphene like Steem, using IPSF to have subscriptions, so I guess like Patreon. The one thing they don't have is a rewardspool but you could actually build on top of #Decent. We wanted to do an interview and have invited them 3x times on the #BeyondBitcoin #Whaletank but the CEO is very busy... I have to get them quickly before someone else does (hint) ;)