I've suggested that idea a million time, it's all yours for the taking for those who want to implement it:

Build a social network where there is a per-user karma/reputation graph, with a recursive mechanism to propagate reputation (with decay): I like a post, that boosts the signal/reputation from whoever posted, and from people who liked it, and decreases signal from people who downvoted it.

There can be arbitrarily more sophisticated propagation algorithms to jumpstart new users by weighing their first few votes more highly and "absorb" existing user reputation graphs (some Bayesian updating of some kind).

Allow basic things like blocking/muting/etc with similar effects.

This alone would help people curate their information way more efficiently. There are people who post things I know for a fact I never want to read again. That's fine, let me create my own bubble.

The TrustNet/Freechains concepts seem adjacent and it's the first time I come across them — looks interesting.