Hopefully every Starwood Preferred Guest member is aware of their personal dashboard. You can reach it here.
Your personal dashboard will list your progress towards elite status and promo bonuses, as well as occasionally provide individually-targeted bonuses.
I logged into my Dashboard this morning and found this:
I duly clicked over to SPG Moments, placed a lowball bid on a Formula 1 VIP package that I know will sell for many thousands of Starpoints. I was immediately out-bid and in a few weeks I should receive my 100 free Starpoints…
Make sure to check your Dashboard to see if you have received a similar promotion.