http://www.bing.com/community/site_b...-straight.aspx
Google engaged in a “honeypot” attack to trick Bing. In simple terms, Google’s “experiment” was rigged to manipulate Bing search results through a type of attack also known as “click fraud.” That’s right, the same type of attack employed by spammers on the web to trick consumers and produce bogus search results.
Yusuf Mehdi, Senior Vice President, Online Services Division. Bing