I'd love to be able to express how much (or how little) I appreciated a market or a creator.

Currenty the user's ability to interact is limited to "liking" a market and on the other end of the spectrum you can block a market or it's creator.

Liking is used (at least by me) more as a way to bookmark markets that are of interest, and blocking users outright is a a bit extreme, as it prevents any kind of further communication or discussion.

I think ratings would be a good way for users to signal which creators are doing a good job of interacting with the stockholders, being trustworthy, resolving markets on time and correctly and so on.

It does not have to be ⭐ ratings for this to resolve YES, any kind of karma score, upvote/downvote, thumbsup/down are good enough.