I see what you mean, Allan, but that would imply to me that in order to fly the Marriott flag a property has to abide by a whole set of standards, some of which regard participating in MR. The way this e-mail was worded was just very loosey-goosey to me, as if any hotel can basically pick and choose when and how they want to be a part of MR.

As an extreme example, I could check in and get a wonderful upgrade, access to a CL, and a platinum welcome amenity while the guest behind me could get squadoosh because the front desk clerk decided at that moment that he wanted to "change their participation".