I've been buying studio-produced content with a Visa card for 20 years. The only porn companies having trouble with payment processors are the platforms that allow users to submit their own content, because of the difficulty in verifying age and consent of the performers. Any reputable production company has a notice up front in their films giving the contact info of a custodian of records that law enforcement can contact to get copies of government-issued ID and signed consent forms from all actors, for every scene. If you don't have that, then sure, you might have problems.