Yep.
Just like a kind of union thing. Only honest trustworthy webmasters, designers or people related to the business. Invitations only (or 99% at least)
It should NOT be used to get discounts or anything else, but more like a sign of approval or quality-stamp, and a networking tool for the members
It could actually work.
I have the domain
www.xxxwebmasters.com (site not up) - would people join if it was free?