And it's way more pervasive than that. Companies who make appliances, mattresses, etc. have been doing this for decades. It enables them to say, "We'll beat anyone's advertised price!" Since all the major retailers are getting models tailored and numbered for their chain, they know they can do this with impunity. This is one of the reasons it's so hard to find the models Consumer Reports reviewed at your local retailer. You have to buy the one from that brand that's close enough.