Shortfall
         

<p>I've written before about the increased use of <a href="/blog/archives/2009/07/spammers-abuse-url-shorteners.html">URL shorteners in spam[/url]. For spammers, the advantage of using a URL shortening service is that the URLs in their messages aren't immediately recognizable as spam domains, and recipients may be reluctant to reject messages just because they contain a shortened URL. On the other hand, if the shortening service admins are on the ball, they can set up tools to do mass purges of spammy URLs. But they must want to address the problem ...</p>
         

http://www.spamnation.info/blog/archives/2010/01/shortfall.html