Earlier quoted context omitted.
I'm not sure "randomness" is the general property, but rather unexpectedness. The content-provider may well be following a "formula" like with fiction plots, that give the protagonist setbacks and victories. Facebook uses approaches which try to profit within the constraints of a relatively small group of programmers trying to make money off billions of users. It doesn't mean these approaches are the best overall at…
Dono what's with your strawmen arguments here or what your point is besides being argumentative, but I didn't say anything about best. I'm gonna just assume they all see some value in it and you don't have any inside knowledge.
Since we're analyzing each other's psychology now, I do think that insecure and defensive behavior like your post is a real problem with social media. I am not trying to bully or hurt you personally, but simply share some thoughts on a topic.