You know, you might have a point there.
The last edition of MAUS came out in 1993, and it runs a bit over 7,000 on the Barnes and Noble sales list. It does seem a bit odd that they would have any real reason to stick that in the ad rotation. Keep in mind that one goofball with a low sense of humor at the outfit would be all it would take.
On the other hand, none of the other books in the rotation seem to be bestsellers either.