LOL @ this promo. I am SPG plat 75 too. This is what I got:
Between Oct 1st and December 31st:
6,000 points on the sixth stay.
6,000 points on the 12th stay.
6,000 points on the 18th stay.
I'm not even sure there's 18 weeks in this period. They want me to do a full stay once per week over the promo, which includes Thanksgiving, New Year's and Christmas.
Thanks SPG for giving me something plausibly achievable. Better go back and tweak the algorithms. This promo to me is less than useless. I can't get six stays in let alone EIGHTEEN.