As far as I know, this is the most popular primitive archery message board; it's where the largest number of primitive bowmakers assemble on line. It makes sense that the place where the largest number of bowmaker assemble is the natural and proper place for new and valuable tools, materials, processes, books and such to be discussed, including where-to-purchase information. If not there, then where? So I'm puzzled that bowmakers would choose to assemble where their ability to post and receive the full spectrum of useful information is restricted.
Allowing such would make the site more valuable to readers, and it seems that as a result, more valuable to the owners, by encouraging loyalty, generating good will, and increasing participation. Maybe if that case is made to the owners they'll change the rule and allow full flow of information.
Years ago I declined the editorship of Primitive Archer mag because of similarly restrictive rules: they were a deal breaker for me then and are now, so I'm leaving this site for less restrictive pastures. I hope they change the rule. If so I'll be back. Meanwhile I'll be posting on PaleoPlanet.