In my case, bringing the printout of the deal worked against me at the Aliso Viejo Plaza store. Due to the wording in the fine print ("Games with a trade value less than $3.00 are excluded from this offer."), the girl working there said I have to trade in a game to get the discount on NCAA 13. She called 2 other stores and they both apparently agreed w/ her. Even though I pointed to the flyer they had in store said NOTHING about trading in games she would not change her stance. I even asked her to try entering a trade-in plus the NCAA 13, which she did, and the price did not discount. She still wouldn't do it, since she called the other stores.
I went to another store right after (w/o the printout), and apparently it was one of the stores she called. The manager there also first told me that I had to trade in a game before getting the 50% off. I then told her there's nothing in the in-store ad that says that. She looked at the ad, and then said "Oh great, I just told another store that this offer is for trades only." She manually overrode the price and called the first store to let them know to just override the price. I'll need to go back to the 1st store tomorrow.