I have used my old (Chase AGR) card number at Amazon since October 1: it worked, and it received the 5x points.Yup, I have a few significant Amazon purchases lined up for it as soon as it arrives. Funny thing is, I have already registered it for the 5x as soon as it showed up on my Chase page, but I have not seen the card, nor its full particulars other than the last four digits yet!