Publish0x is a blog website where you can write posts or curate other people content and earn cryptocurrency but the main difference with Steem is that upvotes are finance by donations and not the community. I think their system is much more fraud proof. But they lack other cool things we have here on Steem like for example dapps. It's not really a blockchain but more a blog platform that companies can use to sponsor airdrops (for publicity reasons).
https://www.publish0x.com/?a=O5xe7LAa7r
I think it's pretty smart what they did with Publish0x since the same company behind Publish0x also owns Bounty0x which is a cryptocurrency bounty hunting platform. Airdrops and bounty hunting go good together. And when people do article writing bounties for ico's then they can use Publish0x.