AmIhotornot.com -- everyday 250,000 people go to this site, run by two volunteers, and I can tell you they are hard graders --  They didn't get this way by advertising a lot.
“我红不红”网站——每天都有二十五万的人光临， 网站由两个志愿者管理，我能告诉你他们是相当苛刻，可是  他们没有绞尽脑汁在上面放更多的广告