Cryptopurr is a 'Facebook for Cryptokitties' or any ERC721 token built on Ethereum by Userfeeds.io. No fees, open data layer. You can purr on test networks, so it's 'for free' (check your Kovan address - there should be a little gift if you have kittie).
We try to establish an organic ecosystem, which motivates the community to engage with their projects more and puts the advertiser in a new role, which serves the community more than the platform.