The entire discussion is between Steam and it's payment processors. And Steam, for whatever reason, hasn't publicly shamed (or discussed) who those payment processors are who were pushing these rules.
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For now, we can rest assured that Itch.io case is being well discussed. We see it is Stripe and Paypal for Itch.io and unless conflicting news comes out, I'll assume the same for Steam.
Answer: because the company I buy Porn from uses CCBill, not Stripe. You know, like what the article says Itch.io is looking into.
There are specific payment processors for pornography. This is accepted because everyone knows that Porn gets more chargebacks (Hubands often have to chargebacks and pretend they didn't buy porn when their Wives find the charge). So there's a large degree of customer fraud in pornographic purchases.
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Like Steam, Mastercard, Itch.io and even stripe themselves are pointing out: the problem is solidly the payment processor. Or Stripe in this specific Itch.io case.
Done. Now when another Manga / Doujin Library gets banned for too much porn on behest of MasterCard, that will be the time to complain. But for now, stand down. This issue is becoming a boy cried wolf like overreaction. Especially as the facts are finally coming in.
That's my point. Stripe is at fault in this exact case.
Also: Having failed to answer a simple question, I conclude that you concede the point and that your position is logically inconsistent. Please continue to post as it only continues to make you look less reasonable.
You have literally no response to my Stripe point despite multiple back and forth.
You know, the Stripe point I brought up in the very root comment at the top? And every time I try to guide you back on topic you've ignored my efforts and tried to talk about something different.
You aren't even talking about Itch.io this entire time despite the article and topic.
But yeah, take your win. I guess I'm too feebleminded to keep up with your gymnastics.