Found this site on textfugu.com (owned by Koichi, a nice guy, see <a href="http://www.helloko.com/2010/06/income-report-may/" rel="nofollow">http://www.helloko.com/2010/06/income-report-may/</a> , strange he is not on HN), and wondered how they could guarantee a low rate of frauds. Sadly the article doesn't say much about their internal processes.