Hit my OM today, they couldn't find the coupon to scan, so after buying three $200 VGC cards, the manager manually returned $40 in cash. He also apologized for the inconvenience. Score! Thanks OP.
I also purchased a few additional items to scramble the VGC transaction total. This is insurance in the event Chase is running data analytic algorithms to identify GC purchase patterns. I plan to visit the same store a different time of day to cash in on more CB!