I can see the argument for both ways considering many of the new "exclusive DLCs" have "Target Edition" or "Gamestop Edition" labeled right on the packaging itself. For someone who cared about collecting every packaged edition, I guess that would matter, but for most its just a "standard edition" with some retailer exclusive DLC.
Maybe as a community we should call those something else rather than "special" or "limited"?
Also, I think some of the things you're adding already have a thread for them? Not sure how the database works, but do we need a separate thread for each edition? Some threads I thought had multiple editions listed such as Ghost/Limited for Destiny or Limited/LCE for Halo 5? Again, not sure the protocol for how the database is uploaded, but just figured I'd mention it.
Anyway, thanks for taking it serious. I'm sure we all want to see a better and more thorough database here!