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BitPay does not accept adult websites. Not only is it against their terms of service but as an American company they are not allowed to provide their service for anything having to do with escorting.

I don't know if any of the well known payment processors would want to be involved with anything related to in-person sex work after what happened to Backpage when they were accused of money laundering because they used crypto. You will probably have to set up BTCPay Server if you really want to accept Bitcoin.