SPG is currently offering bonus starpoints just for opting in to their email newsletters. I believe the number of points may vary per member. Since I am a new member with no stays as yet I recieved only 50 Starpoints. I may be wrong though, maybe everyone will get only 50 Starpoints. Log into your dashboard and check out the offer. You can access your dashboard by clicking here.
Let us know how many bonus Starpoints you earned by subscribing to the email newsletter.