I'm confused. How Steem is "blockchain-based", if the content is not on a blockchain? It looks like a pretty standard Digg-like project to me. Someone is just trying to fuel yet another Web 2.0 project with the blockchain hype.
UPD: ok, I was wrong, it seems everything is on a blockchain here.
All content is forever in the blockchain.
This is not hype man, it is riding on the most sophisticated blockchain in the world.
No joke.
All posts, replies and votes (among other things) are published to the Steem blockchain. As an example, other sites are connected to the blockchain and your content is there, too: https://steemd.com/steem/@mehanizator/blockchain-based