[jd_nlp]

I can see the poster's point of how it could lead to negativity in some cases, but like you I don't understand what the big revelation is here. Social networks thrive off more people interacting with more posts, so they show posts that have been interacted with a little bit to lots of people hoping they continue to get interacted with. That doesn't really surprise me at all.

[kevingadd]

The idea of twitter just randomly deciding to boost a low-like-count tweet because it got replies is EXTREMELY WEIRD. Nobody knew the service worked this way. Showing friends' likes in your timeline is not a new deal but in this case there weren't likes, it was just "high engagement". High engagement tweets are often controversial posts from women or conservatives or leftists, and all of those groups are likely to get inflammatory replies that the original poster may not have wanted - you don't have any control over whether your tweet goes viral or gets ratioed.