You don't pay with your credit card, of course — that would lead directly back to you. So you use the crypto-currency bitcoin, which is easily exchanged for real-world currencies and gives quite a high degree of anonymity to its users.
No tienen que pagar con la tarjeta de crédito, pues eso daría directamente con Uds. Se utiliza la moneda encriptada bitcoin que se intercambia fácilmente por monedas del mundo real y da a sus usuarios un muy alto grado de anonimato.