One of the things you were ranked on was PSP (extended warranty, but they beat it into your head never to call it that) attachment percentage. When a measure becomes a target...
Occasionally there was a loss leader sale item, and in those cases if someone wanted to by it without any attachments, it might have made short term financial sense to pretend we didn't have it, but I don't think the company could get away with that on a large scale.
Source: I also worked there during college. First in customer service, then as a Geek Squad supervisor at a new store, and I was sent to training at HQ up in Minnesota.