Kat sends me this link on CAPTCHA arbitrage.
Stephen Smith points our attention to some examples of quite good economics in blogspam. My example was here, and that comment attracted a lot of attention from subsequent spammers (some of that has since been erased). For instance Tiffany1837Jewelry (web site sadly now defunct) reported:
When Google crawls this page, it basically ignores the URL and any links in the the comment text. In order for the spammer to benefit, they have to persuade human readers to follow the link, so contributing meaningful content is perhaps the only way.
Not too shabby.
a spam formed from the fusion of human and machine intelligence….maybe this is part of the evolution of spam. Not sure I am proud to part of that parentage.
The young Stephen Smith, by the way, is the author of the excellent, intelligent, and well-reasoned weblog marketurbanism.com. He tells me that he is looking for a job in journalism and/or think tank-related activities.