How about this for a suggestion? Until the network grows, how about just two categories...one for kid-friendly, and one for everything else. I'm not sure if that is the best way to describe the categories, but basically, some sort of judgement where those sites that no one would likely object to would fit into one category, and all other sites would go into the other category. Then publishers choose if they want one, the other, or both to be shown on their sites.
i agree with you ,i think if we can't lead our client to the right place ,they may be not will,and it must waste our resources,and it must be not efective