white label is a copy of main site with your own branding and visual identity on your own domain hosted by affiliate program.
it costs you nothing, you must have a nice cam domain, no special requirements.
from one program to another, they have various options to configure.
don't count on seo traffic tho.
i can recommend:
Partner with webcamwiz.com to make cash
Webcam Affiliate Program and Webcam White Label | CamsPower
AWE / Live Jasmin
Chaturbate Affiliate Program
XloveCash: Adult affiliate program ? Xlovecam adult cams webmasters