I get the impression that TikTok--due in no small part to its Chinese origin--also has an army of people explicitly moderating the community and re-weighting content, whether for reasons we might consider good or bad. I thereby really don't think it is fair to call it "AI/ML engagement algorithms unleashed", and I don't think it has any chance of falling into the content tarpits of YouTube (as extremist content would be removed or shadowbanned by humans) or Instagram (as low-effort content farms are essentially non-existent due to the moderation)... but, they also had a major scandal a couple years ago when we learned they were actively telling their moderators to filter out people who looked
too ugly, poor, or disabled :/.
https://theintercept.com/2020/03/16/tiktok-app-moderators-us...
> The makers of TikTok, the Chinese video-sharing app with hundreds of millions of users around the world, instructed moderators to suppress posts created by users deemed too ugly, poor, or disabled for the platform, according to internal documents obtained by The Intercept. These same documents show moderators were also told to censor political speech in TikTok livestreams, punishing those who harmed “national honor” or broadcast streams about “state organs such as police” with bans from the platform.