People browse tool catalogs of their own free will. I wonder if subforums dedicated to advertising would attract attention.
I doubt an unsorted collection of typical ads would be interesting. The subforums would need to supply the valuable service of "good taste" - i.e. only present ads that someone with good taste has selected, perhaps only ads that members have selected. It would still need the attention of an editor to prevent duplication. I'd prefer to see an organized structure, perhaps by manufacturer or by product type.
I don't know the mechanics of how sawmillcreek.org would get paid by advertisers in this situation. It would easy for members to post links to a YouTube videos about a product, but I can't see how that would generate revenue for sawmillcreek. Perhaps the advertising would have to be real ads.