Hi there, here's what we found out:
Since none of the options on Trip.Marriott.com are hotel stays, you would not receive 10 points per dollar that you would for a hotel stay, and you would not receive 5 points per dollar for the credit card purchase. If you use the Marriott Rewards Credit Card, you would receive 1 point per dollar (potentially 2 since it can include a car rental, but that would depend on how the charge is reported to Chase). You can also receive 500 points for booking a Hertz rental.
Hope this helps!