Which sites did users visit immediately preceding buy.xxx?

% of Unique Visits  	Upstream Site
7.90%		yobt.com
4.10%		ero-advertising.com
3.91%		pornper.com
3.66%		icmregistry.com
2.93%		yobt.tv
2.70%		orgasm.com
1.96%		google.com
1.83%		pornoxo.com
1.69%		webcammayhem.com
1.56%		xxvideo.us