Comment by HankB99

This was covered in a recent podcast. Apparently TikTok classifies videos on many more factors than e.g. Youtube and other US companies. China can do this because they have a cheap pool of many users who can perform this activity.

The podcaster felt that with AI capabilities getting better day by day (maybe - that's another discussion) that this multi factor classification could be automated. It seems not to have been done yet AFAIK.