BM/WF outsells any other combination in the interracial niche by leaps and bounds. I have the following sites developed:
http://www.interracial-xxx.com
http://www.interracialsluts.com
http://www.blacked.com
http://www.blackamazons.com
http://www.realinterracial.com
http://www.slutwives.com
the sites focusing on black women just don't produce like the others, not anywhere close to it. Slutwives outsells all of them.