If you know how to get your own traffic, forget having her sign up with one of the big customers and instead have her run her own cam system instead.
http://2Much.net
She can plug in her own existing Epoch, CCBill or Segpay account into it and be paid directly by these billers for all the cam sales she does, as well as all of the cam sales any of her friends do should she decide to expand.
Let me know if you would like a demo or a free trial and I would be happy to set you up.