wherever you get your traffic, one important thing to know and/or ask is the country of origin of your clicks. if you or your sponsor cannot convert 10,000 indian, pakastani, or turkish clicks, what good are they? even if they only cost $1. the only ones making money off this crap are the ones selling back to webmasters - not that all do however.
geo-ip is one good way traffic sellers are using to initially filter traffic. we get ~200,000 type-ins daily from every country you can imagine.
http://www.sex.com/international/index.html we geo-ip and filter by browser language to try and help send only traffic from clicks you can convert if they were inclined to buy something.
although getting them to buy is a job squarely placed on the shoulders of the webmaster.
