I linked to an article about captcha advertising yesterday, so here is some links I’ve collected on the subject. I have found the following four services so far:

AdCopy – In beta, you can request an invite.

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I wrote down a few lists with common link anchor texts. Enjoy!

• click here
• here
• read more
• more
• this
• read this
• link

Replace domain.com with whatever your domain is.

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Reading suggestions from DEFCON 17. Go to the DEFCON website for videos of the talks.

Screen scraper tricks (focus on iMacros)

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Decaptcher has a TCP socket and an HTTP API. This is a description of the socket API, deciphered from Decaptcher’s official PHP client. You can also look at my version of the Decaptcher PHP client that I posted recently. The following will come in handy if you’d like to code your own client.
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The one greatest vulnerability of captchas is the mechanical turk. If a human can solve it, which is not always the case these days, then you can find people that will solve a thousand captchas for a dollar.

Captcha farm services

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