Free 2,500 points on your SPG Amex
(This applies to the Personal SPG Amex only)
Lots of people on Twitter are reporting that anyone with an SPG Amex can earn 2,500 extra Starpoints just by adding an “Authorized User” here.
The promotion is available through September 19, 2016 – limit one bonus per card holder. Business cards aren’t eligible (I tried).