Revain is a blockchain-based business review and feedback platform similar to Yelp or Angie’s List. Businesses incentivize users to leave public feedback that’s posted to Revain’s digital ledger on the Ethereum blockchain. And users are incentivized to review each other – alongside an artificial intelligence-powered neural network – to determine who earns RVN, the ERC-20 cryptocurrency token of the Revain network. RVN is then exchanged for R, Revain’s crowdfunding token sold during the ICO. See full review