That would make sense from a perspective of the transactions being higher risk, so higher transaction fees could cover the additional risk. Why would they not have explored that option in the first place, though?
Probably just a ploy to make the payment processors think they would actually go through with banning porn on their platform. No one actually cares about the porn except a very small percentage of mostly religious nut jobs. They just wanted more money.
Certain categories (porn, gambling, etc) of payments reportedly have a lot more fraud associated with them. If that's true, it makes sense for this to just be settled through a rate-card.
