Check out Phanpy.social for the Catch-up algorithm, which allows you to fully customise and sort your feed.
For a real ‘For You’ algorithm that suggests posts by people you dont follow, check out SoraSNS on iOS. That has a fully customisable algorithm where you can completely customise the topics the algo recommends, as well as how likely each topic is to be recommend.
It is worth noting that what they posted in their business plan in July 23 (1) differs quite a bit from what Jay Graber mentioned as their business plan in an interview with The Verge in Feb 24 (2), which again differs on quite a few points from what Jay Graber mentioned in a podcast with The Verge in March 24 (3).
(1): https://bsky.social/about/blog/7-05-2023-business-plan(2): https://www.theverge.com/2024/2/6/24062837/bluesky-drops-invite-system-begins-federation-at-protocol(3): https://www.theverge.com/2024/3/25/24108872/bluesky-ceo-graber-federation-social-media-decoder-interview
piefed has quickly become my main threadiverse driver. its really nice
PieFed represent! Highly recommended, the ‘Topics’ feature that aggregates multiple community is super valuable to me