I e-mailed them earlier and got this reply back a few minutes ago:
Dear Stephen,
Thank you for contacting GameStop.com
Even though you order was placed prior to the announcement of these premium(s) your order will be included in this offer. Please note that all offers are while supplies...
I ordered the game late Wednesday and got the delay of order notification Thursday night so I canceled and bought it at Fry's for $49.99 + tax. Not a great deal but I'm not the most patient person.
It seems like they would have to be considered different promotions.
But even if they claim that its the same deal it could still work. The wording of the promotional credit e-mail says "Offer valid for one Call of Duty: Modern Warfare 2 for [insert platform here] purchase per customer." So as...