I see your point, but afterall, this guy only wants one thing. Money, he doesn't care how he gets it, other wise he wouldn't be doing what he is doing. give him money with bad feed back? Doesn't make any difference to him, it's not the feedback that is important, it's the money in his hand. Just email him, it might work if he doesn't have the time to read who's complaining to him and who is asking him purchasing questions.