When someone provides information for a "no show" for hotel and car rental with specific information , follow it and don't inquire with head office.
By the way, the car rental I provided for the "no show" will be delighted to do it again next year. I told the 2 managers I will visit them again for the next GS 2012.
For myself, I will never give up 1500 SPG points for a hit. Too valuable for me.