I'm more curious about, it's known that Facebook uses algorithms to display content based, in part on the popularity of that type/user's history of content popularity.

So to what extent does that create a self-fulfilling prophecy where people who tend to post content generally likable to their friends then have that content displayed around and liked more, having a self-reinforcing effect on how Facebook "feels" and how people understand what they are expected to post to Facebook.

Sort of a fast-foodization of thought?