In this spirit, I think Tiktok would actually be a tremendously good matchmaker for finding either friends or romantic partners. I think a lot of their recommendation AI actually figures out what you might like ahead of actually showing it to you, by trying to sort you into a cohort of people with very similar tastes. Which is why as a new user its sometimes scary how Tiktok can almost predict what you might like. E.g. people into cars, 30-40 yrs old, rural probably also like DIY.

That's a good point. A simple k nearest neighbors search of users would likely turn up very similar people to you even if you don't explicitly include any demographics.

What a coincidence, me too. I think there should be a marketplace for them. Ability to lock changes, or go back to an earlier version of your algorithm. Power user tools for curating it better.

That's the next influencer game imo. Having people want to see your feed(s)