Well I certainly don't pay for porn.

And the times my other half sees odd payments on my credit card, she's on the phone claiming chargebacks lickety-split because nobody she knows would pay for porn.

So I have no data to provide on this matter. None at all.

> Well I certainly don't pay for porn.

Quoting from a Finnish crime story:

"People are willing to pay a lot of money for good porn."

"Could be. Too bad nobody's ever seen such a thing."

"My husband would never pay for porn when he has me! Grabs phone to file a chargeback for JOLLYGIRLZ PLC"

"Honey..about that..uh..well..I..ummm.. porn is disgusting!! Thank you dear!"

I'm not aware of concrete stats, but anecdotally the porn industry suffers from extremely low margins caused by, among other things, incredibly pervasive content theft, horrifically low conversion rates, high rates of fraud, high rates of chargebacks, a lot of amateur producers happy to give their content away for free, etc.

Porn consumption is pretty common, but "nobody pays for porn" is a punchline for a reason.

It's obvious why, nobody will process them. /s

Even for people who but lots of it, what percentage of their monthly transaction count will it be?

I seriously doubt this is true. Porn makes up like 20-30% of traffic and searches on the internet.

Even if only 10% of users are paying it would still be a very high number of transactions.

10% of users is unlikely high. Porn has one of the lowest conversion in the online world. It's less than 0,05%. I knew a guy once who ran one of the infamous thumbnails sites and he was struggling keeping afloat although the traffic his site was getting was big.

10% sounds impossibly high to be honest. I would expect something around 0.1%, but I cannot easily find data :(