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Joined: Jul 2009
While this idea is unique, I don't think this would provide any useful information. Most people here don't care where their manga was published and just read the scanlations, without even knowing the magazine it was scanned from.
It's pretty much the same as plotting TV stations which aired your anime. Does it matter if Death Note aired on NTV network? Would it affect your rating if it aired on some other network instead?
I don't think magazine/network is a defining variable for manga or anime; definitely not quite as telling as their genre or even producer.