Click on the link in the email, then post the URL of the landing page where you register for the promotion
The page autopopulates my SPG number into the text box. I deleted part of the web address and it should not autopopulate now. Let me know if it doesn't work.
I was looking at the category 5 hotels and this deal is CRAZY GOOD! I can stay in a CAT 1 for about $100 and get a free night at a $300/night property!
When I click on that link, I come up with:
Eligible member must register by November 30, 2015, 11:59 p.m. EDT. Member can earn 1,500 bonus Starpoints® after one (1) eligible paid stay, 2,500 bonus Starpoints after the second (2nd) eligible paid stay, and 3,500 bonus Starpoints after the third (3rd) eligible paid stay. As part of this promotion, member may earn a maximum of 7,500 total bonus Starpoints for three eligible stays from October 1, 2015, through December 31, 2015 (the "promotion period"). This promotion is not transferable. Bookings made prior to the promotion period are eligible, but only eligible stays consumed during the promotion period will earn a bonus.