This may be a silly question - I am planning stays for Plat Challenge and notice at one of the properties I would stay, the Marriott Reward Member Rate (cancellable) is always the lowest among the public discount rates including AAA and Senior Rates.
However it also says Please note: Non-commissionable rate versus the AAA or Senior Rates only say about Valid ID required.

Is the Marriott Reward Member Rate is an eligible rate to earn Stay / Night? I emailed [email protected] but have not gotten any response so far.

I could not find any clear answer in the FAQs on Marriott site.

I do find these languages -
Rooms booked through third party online retailers, such as Expedia.com, Travelocity.com, Hotels.com, Booking.com, Priceline.com, Tripadvisor.com or any other 3rd party online/mobile travel portal (regardless of how the hotel is paid) are not eligible for Points or Elite night credit. Wholesale rates, wholesale packages, Fam-Tastic® rates, travel industry rates and organized tours or package bookings are not eligible for Points or Elite night credit regardless of booking channel.

This is bothersome because the hotel lists the Member Reward Rate under "Packages".

Does anyone know the answer whether the Marriott Reward Rate is good to use for pay stays to do the Challenge, even it says Non-Commissionable, and is under "Packages"?