Earlier quoted context omitted.
The payment processors say the reason is high fraud and charge-back rates in those industries that make it unprofitable to service. I don't know if this is true or an excuse. Either way, its an excellent reason why this critical infrastructure shouldn't be under corporate control.
Well that is fair point, but cannot they just increase the commission to cover them? Also I think it is weird that when someone steals a bank card, they use it to buy adult games instead of buying an iPhone or MacBook and shipping it to the third world country.
Combined with prevalence of the suspiciously well standardized "because porn users and gamers chargeback Steam purchases way too often" canned responses, I think it's just an excuse, if not "the" excuse somewhere - like the basis for using incorrect data for internal risk modeling or something like that.