a solution, make free accounts for those people not selling stuff, and have an annual paid account with a visible title of commercial trader, or similar, for those who wish to help people out. unlimited replies to threads, but limited new threads.
if a private account starts commerially advertising, report as spam, kick them out and ask them to pay to continue.
that way people who aren't interested in club mags ads, etc, can contribute to the club via paid membership, and have a limited right to advertise, without clogging the system with crap.
just another log to throw on the fire...