I will take the diplomatic high road and just note that reviews on turkopticon are mixed.
Keep in mind:
(1) If you submit a URL that he already has, you get rejected. He could already have a pile of URLs from any other crowdsourcing platform, or from his own research. Basically, he can reject anything you submit, and then claim he already had the URL.
(2) The pay is 1¢ per HIT, 1 URL per HIT.
Personally, I would run as fast as I could in the other direction. YMMV.