02-24-2006, 12:23 PM
Quote:ÂOn March 1, 2006, Yahoo! Search Marketing will modify its editorial guidelines regarding the use of keywords containing trademarks. Previously, we allowed competitive advertising by allowing advertisers to bid on third-party trademarks if those advertisers offered detailed comparative information about the trademark ownerÂs products or services in comparison to the competitive products and services that were offered or promoted on the advertiserÂs site.
  In order to more easily deliver quality user experiences when users search on terms that are trademarks, Yahoo! Search Marketing has determined that we will no longer allow bidding on keywords containing competitor trademarks.Â
full article: http://www.searchenginejournal.com/?p=2990
related topic: Google AdWords sued for selling Check 'n Go keyword http://community.tuliptools.com/index.ph...572.0.html