I don't think that Steemit should compete with Facebook as long as those platforms are quite differents.
Steemit is more a blogging platform with some social features, not a social platform like Facebook, Twitter or Google+.
Steemit should be competing against WordPress, Medium and Tumblr. Many Google+ users are writing long posts, so maybe they should also be considered, although being considered very often as a social platform.
The problem is that sites like Facebook have very powerful gravity and it's hard for people to break away.
I loved this sentence. I think that it has been the first time I have read "gravity" when talking about Facebook and its users.