Dude, why build this on whaleshares or Steem, unless you just want access to the community? You could integrate it into Ethereum via Loom or your own version of Loom and reward people with NFTs and fungible tokens.

All you need is for people to verify their account by signing with metamask, then you don't have to worry about junk like RCs and people's assets could remain off-chain until they care to store them on Ethereum.

I can see serious potential for FPS NFTs, like guns and stuff. It would be awesome and if you used Loom you'd even have access to the Loom Marketplace for selling digital guns, knives and stuff. You should totally make a gun called the Betonator...