I am running an adult site that has been going surprisingly well the past period and I am planning on monetizing it. I want to add a subscription based payment system and I am looking for something similar to Paypal that offer this service. Paypal doesn't allow adult sites. The few ones that I did come across require some extensive details like organisation/tax related documents which I will not provide. Is there an alternative to Paypal that has an easy setup system for this type of site?