About doujin circles

A thought just occurred to me:
we rarely seem to tag doujin covers with the appropriate circle name, even when the artist is known;
i.e. doujin_cover arttags:2 returns only 1 page of results.

If you don't mind, I'll start tagging as appropriate.

Uh, I don't think we tag circles here when we already know the artist. (and a lot of circles are just one person anyway.)

Policy is to alias circle -> artist. We even have a dedicated thread for it: forum #47938.

Just verifying that jjj and HM are right, circle names are only tagged if we don't have an artist name.