Someone asserted to me that porn purchases have a really horrific chargeback rate, and that's the main reason credit card companies are against them. It sounds at least superficially plausible.
That's not really true. I consulted for two companies that provided payment processing services for... non family friendly websites. They were making out like bandits charging ~30% fees. The blended charge back rate for this side of business was about 5%. The blended charge back rate for the family friendly side of business was around 3%
