The online review platform Revain has created the first decentralized review system using a two-step verification process on the basis of blockchain technology. It encourages its users to participate in the review process by rewarding them with RVN tokens — a stable non-volatile inner currency — but also has the R token as a crowdfunding instrument. Reviewers are rewarded with tokens for every submitted review, with the only requirement being that the review should pass through the filtration stage. RVN can be exchanged for R tokens and vice versa