I got couple of them buying in chatgf even $250 a day one of them but this is 1 every million of them so that's worst then india or even turkey.
The stuff that chinese buy in porn sites it is phisical goods like viagra and dolls:
http://www.hky222.com/
They have lots of cute dolls:
http://www.aiiwawa.info/index2.htm
But no idea how to deal to sell traffic with those chinese doll sellers?