While I was at BB getting Finding Nemo, I tried to get both the promo and the PM.
I had the purchase rang in. She made sure the GC offer would work. She then did the PM. Manager came over to do the override but needed to call to verify since my phone showed $39.99 and the web showed $59.99. After the call, GS verified the $39.99 price. When he rang it out (manager), the GC tried to come out but he wouldn't allow it. He kept the PM and discarded the $20 GC promo. $40 was fine for me. It was worth a shot.