to believe Marriott is not aware of the potential of multiuse of these certificates is a little naive. to believe that Marriott is not aware that these certificates are also available on ebay would be equally foolish.

The multiuse of these certificates, at whatever level that may be viewed two ways. First it may be seen as an undocumented perk for Marriott platinum members to share with their families and friends. (Again, I would not assume that Marriott is not aware of this action). Marriott management should be applauded for "looking the other way". Second, as properties have significantly lower occupancy rates during weekends, these certificates help draw occupancy among those family & friends who may just as easily have stayed at a competitive property.

Bottom line, if the misuse was rampant, you can be sure that Marriott would take it's "head out of the sand". Obviously there are bigger issues to handle. Let's appreciate them that they leave this one alone, at least for the time being.