I've tried using it a few times, there isn't much of a community so engagement is pretty low on my posts, there are a few steemians using it too. I wasn't really blogging for rewards so it didn't really phase me that I earned none.
I think they need to work hard on recruitment and improve revenue streams for a bigger reward pool while also having a donation and subscription model for content and it could be a winner. Medium is starting to fail alot of publishers with its new monetisation strategy so alternative sites like these have a real opportunity