I stay at SPG & Mariott properties. I called Gold customer service and asked about merging to keep both accounts active as I get tired of staying at a SPG one stay and Marriott for another just to keep my two different accounts active. They are linked. Was told if I transfer some Marriott to SPG at a 1000 to 333 rate it would update my last activity. Transferred points to SPG 2 weeks ago and found that is not the case. Would like a definitive answer. Thank you.