Would you trust Google's ( or other search provider's) ads more, if they had a separately browsable "classifieds" site, not unlike Craigslist, that the search ads would be search results from (reach modified by how much the ads were paid with, ofc.). Anyway, when you saw an add, you could click through it like now, or click to browse a relevant section of the classifieds site. Which would also work as a catalog of all paid and also unpaid ads the search provider carried?