<A target="_blank" href="http://www.pcworld.com/article/181806/microsoft_stifles_information_on_bing_cashback_error.html?tk=rss_news">The Bing search engine has a cash-back promotion to entice users</A> and merchants. But, there seems to be a problem in the code, making it easy to exploit. So far, Microsoft's response has been to try and silence the user who discovered the potential problem.