2257 says that models must be 18+ and participate in shootings by good will.
what's about incest, rape?
are they restricted by billings' will (to be more exact MC and Visa) or there're some government regulations?
i saw some paysites in these niches, they use microbillings which accept both Visa and MC

so what's the deal?
i'm not working w/ them. just wondering for general interest.