A POS sign is a "point of sale" sign. Any advertisements that are not part of the packing for the product could count. Some stores have coupon dispensers for the product. I would count that. Some have video displays. I would count them. Some have blade signs (signs that stick out into the sisle at a 90 degree anlgle). I ould count them.
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008