Tomn, I like your idea. However unlike the wine site, the members here do not buy anything directly from PM.com. I belong to a BBQ site that offers a members only forum, this consists of internal organizational threads which may be appropriate for that site, but here not so much. Now IF there were a pizza equipment or pizza ingredient sponsor of this site, then perhaps a membership here could include either discounts or free shipping of needed supplies.
Obviously this gets into a whole new realm of " corporate sponsorship" .