Looks like steemit success and open sourcing the web site has produced the first ICO based on steemit
From first look it looks like a mix of steemit setup with lisk setup. PostBase ICO pre-announcement describes the project as follows:
Postbase is an ambitious social bookmarking and funding project that is focused on the development of a fully decentralized social bookmarking platform that rewards users for submitting quality content. At the core of the postbase platform is the POST cryptocurrency.
https://bitcointalk.org/index.php?topic=1576067
