With PornHub that makes sense because the type of content they provide is the crux of their businesss.
But does anyone care or know what MasterCard is associated with? I would not even think to blame PG&E for providing electricity, even if the recipient turned out to be doing some super illegal things with that electricity.
So I am not convinced by reputation damage to payment processors. I am more convinced by unacceptably high chargebacks and fraud, but even there it is hard to explain the about face that payment processors have made here. Curious!