This changed about 2015 as the weak and powerful alike learned how to manipulate discourse of social media, and bots started flooding most platforms.
Right now the biggest "positive" effect I can think of is that people are less idolized. Before social media you only saw the good side of most public figures. Now that we get to see a lot more unfiltered thoughts from them we get a much more nuanced picture of everyone, both their good and ugly parts. Not sure if this is a positive overall, since lower expectations also means we don't hold people to as high standards. I guess we'll see how this plays out as society adapts
Making tech- /ad- companies rich?
However this account hardly contributes to that conclusion since it's so small a study without any controls, at least according to the rewrite. I really wish the link to the original poster wasn't broken