I doubt if Marriott would have added this benefit without telling us, or without challenging Hilton's claim that they are now the only major program to offer double dip.

This year I received communication from Marriott about the increase in marquis bonus, and the inclusion of Renaissance for marquis qualifications. But they were silent about the elimination of air/car bonuses. When I wrote to them about it they replied to me:
"Our partnerships with the airlines are in the process undergoing very exciting changes. Some of these changes will make it much easier for our members to travel using points."