These days, so many email from different vendors, most of them advertising at a higher price line than the market.... I guess they don;t even research the market before they send out sales email to their client data base.
What it does is tire out the client's anticipation. No more looking forward to the "sale" notice. Kinda like the Taylormade killed off the anticipation for new golf club by speeding up the product cycle. They forgot that they are also on the hook.