Does anyone have any insight on why certain dates are left out off of some of the coupons? For example, I see a set of sequential dates on a coupon, except one or two dates would be excluded. E.g. one week out of 2 sequential months that the coupon applies. I can understand holiday weeks being omitted, but some don't seem to make sense to me. Can anyone shed some light on this? Is it due to supply/demand for specific dates?