Hi, I reservated a room online using eBreaks rate. I see the following in my reservation.

Room 1

* Non-Commissionable Rate has been noted please inquire at check in.

Marriott eBreaks Rate is non-commissionable King Room, 1 king bed with 1 sofabed

What does non-commissionable mean? What do I need to inquire at check in?
Will the rate earn points? Is my room guaranteed?

Thanks.