Just received this email:
"The year is almost over, but you can still get your special savings offer while it is still available. Click on the button to the left to discover just how many Starpoints® you can save — anywhere between 25%–50%. Whether you want to redeem for Free Night Awards or SPG Moments℠, or give Starpoints as a gift, make your purchase now — your offer ends on December 31, 2016."
Limit is 30,000 points.
I got the 35% off.
If you get 50% off, 30,000 points would cost you $525. That's .0175 per point.