[edcrfv]

Spammers are the ones who use it extensively and that's why such a service was born. The percentage of people using it for other purposes would be infinitesimally small.

You can't directly attach value to the money they spend on this. They create accounts on many services like Gmail, Yahoo, Hotmail, etc for email spamming and they need to use these services for the tools that they purchased to work. These tools basically automate everything except the captcha solving part.