"...he still shouldn't be getting outsold by something like GLC."
He's not. There's clearly an issue of ASM that outsold GLC.
If the other 3 issues were called Friendly Neighborhood Spider-Man, Spectacular Spider-Man, and Web of Spider-Man, would you still be making the argument that a book that was heavily tied to Blackest Night/Brightest Day was outselling the sister books of Amazing Spider-Man?
well, at least for me the art in recent issues of ASM is a big letdown... my 6 year old cousin draws a better spider-man than Paul Azaceta (Origin of the species). combine that with a price of $3,99 and you see, why sales dropped, i guess.