Well, it is Wal-Mart after all. They just want to sell stuff. Money is green, no matter who hands it over to the cashier. Why should they care? What is social-engineering going to get them? It might get them "dedicated customers", but they don't care about dedicated customers. Nobody in the big-box retail business does. There are plenty of customers who shop there because it's cheap, and you can show up in size 88 sweat pants and fit right in.