The difference is between what "we" (FTers with Marriott Gold+ status) consider an upgrade and what Marriott considers an upgrade to the non-status hotel guest. "We" would normally get concierge lounge access anyway, and a "concierge level" room is normally the same as a regular room except maybe there's mouthwash, so we don't consider it an upgrade, unless maybe it's at least on the same floor as the lounge itself. However, for a non-status or silver-level guest, they would not normally get lounge access, so Marriott charges more for the room that gets lounge access, and thus considers it an "upgrade" when someone gets that room for the rate of a normal room. As for me personally, I do find it quite silly when they "upgrade" me to a room that's the same as the regular room I would have gotten anyway, unless it's on the same floor as the lounge.