They certainly did! Far more than what was really necessary. Some of the Credit roles didn’t even make much sense to me.
You might already know this: @Madir who did the preliminary work on the Bookogs dumps posted some comments regarding the various credits and formats: Matching bookogs credit roles to bookbrainz and Matching bookogs formats to bookbrainz
I am happy to work through his list of Credits and consolidate wherever possible to a similar BB relationship role.
The other topic that needs discussion is whether there are plans to expand the current BB relationship roles, e.g. an editor role which currently doesn’t exist.