Really funny, eh.
But seriously, I don't think you quite get me, CPA/PPD means Cost Per Action and Pay Per Download, since sociopaths marry for money they obviously love the idea of making money aswell, for example you make a website and put a gateway on it, for example a website that shows you how to hack a facebook account, when the person clicks on Hack Account a gateway will load asking him to complete surveys, everytime the person completes a survey you make money, PPD is pretty much the same but in this case you just provide a download link of a file (the file should look promising, and worth completing a survey for) and when the person clicks on the Download button a gateway pops up asking him to complete a survey in order to gain access to the file, this is PPD.
But the funny part about it is, the file NEVER unlocks, so you keep making money and the other person gets ntohing.