Personally I think cash is King
people can always do chargebacks and cancel cards or report them as missing or stolen. What if a guy decided to refund himself for a date he thought was not up to par? Or worse, he had a great time and to make it a better one he gives it to himself for free!
Generally, if you get enough chargebacks on any bank account in the US, its pretty much impossible to open a new account after that. Also, any business license you have can be revoked.
I think cash only is what makes this part of the adult industry so awesome! When I do webcam shows or do other naughty work via internet, its all CC and I'm very vulnerable to chargebacks. Plus, cash makes less of a papertrail for both parties. Your entire client record is in your bank statements....yikes.