I'm not following them because we have reciprocal social arrangement where we're "friends", or because I want to chit-chat with them, or see what they're eating, or what asinine 280 character fragments of streams of consciousness that they emit into the void, or to participate in the typical "best foot forward" profile stalking and preening BS that I can't stand about social media.
GitHub is a social network, no doubt, but it is not social media and I hope that does not change.
I'm not sure if I'm convinced this has worked as a bookmark for my repositories: no one ever removed a star from any of them, and no one ever returned with any feedback later. It could be a matter of a small sample size, or of people never actually coming back (which is the bookmark's use case).
They are just leaning into it more.