This is my first online community as well. Wasn't a social media person until Steem. . .
Was inspired by this community to write the "diagnosis" and also by some things Sean Parker had to say about Facebook.

Here are some of his comments:

With each like and comment, Facebook is “exploiting” human psychology on purpose to keep users hooked on a “social-validation feedback loop,” Parker said, adding that it is “exactly the kind of thing that a hacker like myself would come up with.”

When helping Facebook get off the ground in 2004, Parker said, he and others involved in the nascent social network thought: “How do we consume as much of your time and conscious attention as possible?”
“And that means that we need to sort of give you a little dopamine hit every once in a while, because someone liked or commented on a photo or a post or whatever. And that's going to get you to contribute more content, and that's going to get you . . . more likes and comments.”
https://www.washingtonpost.com/news/the-switch/wp/2017/11/09/facebooks-first-president-on-facebook-god-only-knows-what-its-doing-to-our-childrens-brains/?utm_term=.7bb06a9e64dd

Steem could be even more addicting due to the $ rewards. . .