Store doesnt recognize App even though theyre featured

Went to get my "savings" at Walmart. Employees never heard of it, but were kind enough to scan the code to attempt my refund. Sadly the barcode was not recognized by their system so I went out of my way to a store I didnt need to be at for nothing. Perhaps in time when the app becomes more established, but it seems to me that a store featured in the app should know whats going on. Plus there are apps that credit you savings without you doing all the leg work to retrieve the savings.

Beau and Claires Grammy about Windfall - Save Money After You Shop