This sounds like a great feature! My appetites for different clusters content certainly vary according to my mood! Perhaps "mood" would actually be a cute-but-clear name for such distinct/multiple profiles. :)

> The article comments one is a toughie, as LLM use skyrockets when you scrape and consume content from the links. It would be awesome to include it, but would likely need to be paid, just from a cost perspective.

Hm. That is a good (and in retrospect, obvious) point. If it makes the feed a lot better, I think it could certainly be worth it for some users. If it only makes a small difference, maybe not. It might be interesting for you to experiment and write about, since what kind of difference it will make isn't obvious (at least to me) up front.