I noticed Erica has a photo of a tag with dates 10/11-10/24 on the page for next week's ad. So maybe it's rotating between regions, or between or stores? Someone reported different results on Sunday at two stores, five minutes apart.

I still think this is a new product promo, not a fire sale, so maybe CVS is trying to control the total number of redemptions, and that's why it wasn't advertised in the circular.