I've wondered what the rational is for having Marketplace open to all users. Most of the forums I participate in have very strict marketplace rules, as well as a minimum post count to send messages and even see FOr Sale items. It sure cuts down on the scammers.
From a post a couple of years ago...it appears that the MOA doesn't control the access credentials to the MarketPlace.
https://forums.bmwmoa.org/showthrea...ost-by-98lee&p=1122924&viewfull=1#post1122924