(where's your edit button)
Sonic is purple in this scan - the original magazine looks like this, because of the way it's printed. Do you colour correct it? How do you know it doesn't need colour correcting?
Luckily though, these aren't completely pressing concerns because nobody seems to be doing a good job at preserving magazines. And there's a good reason for that - there isn't a great deal of need for magazines to be preserved - they should be preserved because that's the best way to do things, but the obvious next question is "what are you going to do with this scan?". Usually the answers are "read it" or "edit it in some way".
While we should probably be getting into the full fat preservation game, Retro CDN is acting as a practical resource for our wikis. I use scans to document things and verify facts - that's a higher concern for us than pristine copies of 25 year old magazines (or at least while there's technical issues afoot). I want the best scans possible but I also don't want to be spending my life worrying about the quality of an already non-perfect scan, when the intention is to document the Sega Saturn's history or something.
Incidentally the same applies to old home computers. Want to emulate an Amiga game? Chances are you'll be dealing with a cracked version that bypasses all the copy protection and security gubbins. There is (or at least was) an archive for pure, byte-correct images of official floppy disks, but while this is an essential job for the preservation game, it's not a practical solution for most people emulating Amigas.
And these super duper achives can only exist because cracked copies are widespread - it's not an either-or - there are very few scans of the UK's official Sega Magazine (hint hint I want some) so at this stage I'm not worried if they're 300dpi, 600dpi, or 348098204932dpi.
But Retromags can make its own decisions. Point is, you ain't gonna get no perfect scans.