Rosalind - 10:21 pm on Sep 17, 2009 (gmt 0)

How much money is there in these spam registrations?

Less and less, if the way WebmasterWorld members are jumping ship is at all representative.

I don't know whether this is about scanning books or tracking users, but there's another possibility: using the captcha to ask "is this spam?", or "is this true?" in the case of a statement. Something like Microsoft's Page Hunt, except cut down to a captcha size.