I saw this is on Redweek. It mentions the owners association. So I don't know if that means the resort HOA has taken it upon themselves to try to enforce the "no commercial renting" clause.
I had heard rumor of this. I'm not sure if it truly went out to *one* owner or a lot of owners. The Marriott DC contract is a bit vague when it comes to what "commercial" activity. Is it one owner renting their unused weeks or points? Or someone managing millions of points and hundreds of weeks at a single resort? The DC contract allows points owners to transfer their points, but is fuzzy on what commercial activity is and where the threshold is.
The Grand Residence Club at Tahoe allows us to rent our weeks either through Marriott, a 3rd party, or directly if we prefer. (Renting direct through something like VRBO is something akin to work.)
My first thought was that it was one annoying owner that the local Association was irritated with. I have always figured that owners that rent their weeks or that rent their points are such a tiny, tiny share of Marriott's occupancy that it would not even come on their radar. And, it would certainly be good in that it brings more non-owners on to the property.