I guess I wasn't seriously questioning the reasons why they would do it. It does make sense but isn't there some point where complimenting your customers to make them feel all warm could go "too far"? I'm pretty laid back with not very high expectations of customer service (not a pessimistic person, just easy to please) and it just comes off as rather excessive, at least with the way it's presented.
This probably comes off as looking the gift horse in the mouth but at some point it does come off as excessive, like when I get bum rushed to be helped the second I look at a product in a department store.