Originally Posted by controller1

Your question is not specific to the SPG Amex and the answer can easily be found through a search of this forum. Also, you can find the answer in the T&C of the SPG program:

3.2. You will be considered an "Active Member" so long as (a) your Membership has not been cancelled (by you or us), and (b) you have had an Eligible Stay at a Participating Property within the previous 12 months, or (c) you have earned Starpoints by using a Starwood Preferred Guest Credit Card during the previous 12 months. Starpoints resulting from transfers or earnings from Program affiliates do not count toward active status. Owners are not subject to the Eligible Stay requirement and will continue to be considered an Active Member as long as they own their Vacation Ownership interest and maintain their Starwood Vacation Ownership account in good standing.