I stayed at a downtown Marriott last week that I booked on priceline (of course, I wanted to stay at the airport Hilton, but them's the breaks). I did get credit for the stay and points for the outrageously expensive valet parking $23=230 points. I gave them my Marriott card when I checked in. I think it is just dependent on whoever checks you in. I never count on the points and am always pleasantly surprised if they post.