As we see, most of the recent media trends are related to the control of the social media. Facebook and twitter are banning people for any kind of right wing posicions in discussions. Government is using social media to track criminals and other militaristic stuff. There is no way for those people to loose control of media resources. Corporations have too much money to keep their dominance.
Steemit is probably the first ever blockchain based social media that became successful, but didn't hear any other prominent names after that! But Steemit is not a full fledged Social Media platform like FB.
I consider success basing on the results of the project. And the quality of top rated content from Steemit is absolute garbage. On any other platform even the shittiest bloggers are making much more money than they could make on steemit.