Requested with STYLE-742. We have 234 Metacritic links at the moment and from a quick check most seem to be links to reviews.

It would make sense to allow Metacritic links for RGs for now, using the "review" relationship type (while technically these are review aggregations, they still have a score and links to all the reviews and adding a new relationship type seems like overkill). For example: https://www.metacritic.com/music/the-record/boygenius

There's also a "person" page for artists, but at least for now they seem to show only film and TV appearances (https://www.metacritic.com/person/boygenius/) which does not seem relevant enough to us. I'd ignore these for now since they don't fit any of our artist-URL relationship types properly anyway. Metacritic are apparently revamping their music section, so these might become useful in the future, in which case we can reconsider.