The author is very confused. For one, not having access to VISA/Mastercard isn't being unbanked. And more importantly, there is no need for the burden of supporting CC payments to fall on developers at all. Steam, itch, etc can just add it as a payment method. (personally I don't really think it's an amazing solution due to crypto volatility)

Seems that the West has just now realized that the payment processors are a threat to adult content and are getting in an uproar. Japanese sites selling adult content have been banned for years at this point, they've moved on to supporting JCB as the only accepted credit card and otherwise accepting site-specific points you buy at convenience stores. I've seen crypto as well by proxy via Bitcash.