I think I made it out big.
I bought my PS3 online last week from best buy. Came w/ a 50 buck GC to be mailed. (I picked up the ps3 in store).
Then I saw this coupon
Well I printed it out, packed up the PS3, and went to the store.
Told her my situation, even that I had a 50 buck GC in the mail, and she hooked me up. Returned the PS3 to a GC, bought a new one w/ the GC and I get my ps3 and a 100 buck GC plus the 50 buck GC in the mail. As far as I know she didn't do anything to cancel that.
My karma is clear because I told her about the 50 buck GC in the mail.