I noticed the ad in toward the rear of the Winter Amex Platinum Departures magazine. It said to called Platinum Travel Service for information or to enroll. I called. And my Amex Plat given Carlson Silver was upgraded to Carlson Gold within 2 hours. I also confirmed that the benefit is ongoing as long as an Amex Plat is held, like the SPG Gold benefit, and not for 1 year only like the Hilton Gold benefit. Great news - just in time for the current Carlson Triple Points promo!