If those hotel did paid Marriott to "deceive" the customers, then at least have the decency to clearly marked them as non participating and put these hotels on the bottom of the search result.

Currently, when you search for a hotel in their respective cities, they are mixed with all those participating hotels and there are no notes about their participating until the last page when you confirm the reservation.
And like I mentioned before, the note was cleverly put into the most inconspicuous place usually in the middle of other random notes.