So last month I stayed at a hotel and used the 4th night free. I saw the refund come through a few days ago. In the mean time I made three more reservations. One was for a Vegas hotel that required one night pre-paid. I got a mysterious credit that wasn't for the CWT stated amount for any of the three reservations. Close, but not the same. The only thing I can figure is the pre-paid charge triggered the rebate for some reason. Anyone else have this happen on pre-paid stays?