@sun@cassidyclown@georgia@ageha Yeah, they typically do a bit more than like archive.org or a random FTP site (not sure for JSTOR but some publications hosters have quite neat tagging, plus full-text search at scale).
But it's a bit like if something like if a somewhat commercial software repository were offended by someone making a mirror (meanwhile I think sourceforge, which is corpo-backed, still has few other organisations including corporations hosting official mirrors).