[notacoward]

Well, "social media" covers a lot of things including this right here. Tumblr is IMO one of the best examples of less-manipulative social media recognized as such. There are ads, but they're so ill targeted that they're often the butt of jokes among the denizens. There also is a new-ish algorithmic feed, but the default is strict reverse-chronological people you follow. While people do post videos - often from the bigger or modern sites - they're far from dominant. I think Reddit is at approximately the same "evolutionary level" but I don't hang out there much so I could be wrong.

Personally I find my time on Tumblr much more gratifying than my time on Facebook (yes I still actively use both) but that's more cultural rather than technical. Is the relative lack of vapid "influencer" types a function of culture or format? I think Reddit is at approximately the same "evolutionary level" but I hardly hang out there so I could be wrong. Reddit might also be the main counterexample to the general rule that sheer size and the OP's three axes all go together.