If it was announced early that the 0% financing was extended, a lot of sales might not have been made and some may have been lost to other brands with the additional shopping time people would have had. Expiration dates to offers create an "urgency" on the part of the buyer, when they know that tomorrow will be too late. I have purchased products at the grocery store that have been "on sale" and stocked up, only to find the next week that the "sale price of the week" was lower than last weeks sale price. An example is last week, Pepsi was 3 ....12 pack for $9.00 and this week it is 4 ....12 pack for $10.00.