Websites can give usefulness hints

[quasicomputational]

The website may have a very good idea of what resources the user will want to access - e.g., the next chapter of the book they're reading, rather than some randomly selected one according to general-purpose browser heuristics.

Giving the website a way to indicate likely usefulness for registered and suggesting (but of course not requiring) the browser uses that as an input would likely be a good idea. Note that this should only affect the ordering of resources shown within a single registrable domain.

Concretely, this might look like a real-valued weight field being added.

This is also distinctly optional and not needed for a MVP, but I do think it could be quite useful.