can choose to accept them and be part of the convention or not. Thus the ZCCA has nothing to do with who sponsors it other than trying to get Nissan Corp to donate to the convention.
Giving sponsors a room is crazy in my opinion. AMS did try to pull that crap on us (free rooms) and I flat out refused to give in despite others trying to convince me to do it.
Phoenix just say no to AMS and don't even offer them a sponsor package and when Chris or someone else tries to convince you to do otherwise just say "No Thanks". What are they going to do? take the convention away if you tell them you don't want AMS there?