Steemit

 Steemit  is a blogging silo with gamification (badges and achievements to be unlocked) to encourage publishing posts, replying, upvoting, and other interactions. Every interaction is then assigned a token value using the STEEM cryptocurrency. Posting, liking and commenting earn tokens and the content and valuation are captured on a blockchain ledger. Currently membership is not open, and the users have to go through an approval process.

See https://steemit.com/steemitboard/@steemitboard/steemitboard-the-steemit-gamification-experience for a description of their gamification and pictures of the badges, levels, etc.

There are also skeptic views on the Steemit business model.