A lot of the content on AMR has been directly ripped from existing scanned magazine collections. I've have complete scanned collections of certain magazines for some years now and the scans for those are identical (but lower quality) on AMR.

That isn't really an issue from my point of view as such scans were always made with the intention of being shared. The only issue I do have is that they are too low quality to ever be considered a preservation project for the future. Great resource for now though.