HIs have had this promo for a couple of years now. For some reason, this promo is not always highlighted on the PC site. But ads run in a lot of travel magazines and weekend newspaper sections to promote it. This can be a good deal during the week, but weekend rates are generally a lot less and can often be had for Thursdays as well as Fridays and Saturdays, so an end of week stay may be cheaper NOT using these certificates.