The fact check here is important, but saying that it was just "due to illegal UGC" downplays the fact that there are lots of platforms with oodles of "illegal" UGC, but it's the porn companies that have gotten the brunt of CC companies' ire. The increasing scrutiny specifically on porn (some of which is due to SESTA/FOSTA, as another poster pointed out) has had a chilling effect on sex work across the whole web.
Also, while true that CC companies aren't anti-porn in a strict sense, credit cards really do not get along very well with sex work or porn in general. They'll reluctantly take their money, but it's a very strained relationship, with high fees in part due to the high number of chargebacks, and in part because no one is going to go to bat politically for porn sites.
It's arguable whether the CC companies are "anti-porn", but they are definitely not "pro-porn".
Also, while true that CC companies aren't anti-porn in a strict sense, credit cards really do not get along very well with sex work or porn in general. They'll reluctantly take their money, but it's a very strained relationship, with high fees in part due to the high number of chargebacks, and in part because no one is going to go to bat politically for porn sites.
It's arguable whether the CC companies are "anti-porn", but they are definitely not "pro-porn".