my research: alexa rankings for avs-systems inside
 

just done for myself to get an overview - here are the results:

Traffic Rank for proadult.com: 28,359
Traffic Rank for sexkey.com: 28,671
Traffic Rank for cyberage.com: 39,769
Traffic Rank for netverifier.com: 62,295
Traffic Rank for freenetpass.com: 81,255
Traffic Rank for cybersexnetwork.com: 162,528
Traffic Rank for xxxsexticket.com: 291,334
Traffic Rank for bxdx.com: 397,286
Traffic Rank for universalpass.com: 421,923

well, ok, but is it better to promote the websites with the higher rating and the other ?

i am not sure what is really better

just seen that i have forgotten goldxpass

Lol, You've forgotten goldxpass, but you didn't forget deluxepass, videosz, ztod, videobox, dooza, icoo, dvdbox, ... ? :)

deluxepass, videosz, ztod, videobox, dooza, icoo, dvdbox, ...are aen sites and no avs sites (aen=adult entertainment network)

is there really a difference, visa has disallowed to use credit cards for "adult verification". Avs is only an expression.