Facebook isn't really a blogging platform for unique content. YouTube has a somewhat similar model except only the content creators receive any reward and the comment section is horrendous. Reddit has the same sort of platform, but again a poorly designed interface to create meaningful posts. Steemit has the ability to allow users to post anything without censorship as long as it isn't spam or content that many people find lowers the quality of the user experience. Also many of the major social media services are supported through ads. This would be quite difficult to overcome for a giant company like Facebook. I agree that steemit has shaken up the game and others will respond, I'm not sure how well they will be able to copy experience people have here and the type of community it provides.