Highly doubt that or otherwise other platforms with similar content behind pay barriers, would be either doing the same thing, or doing something rather similar. Besides, both Mastercard and Paypal require you to be an adult, or otherwise supervised by one, in order to own an account with either of them. Meaning that they have no reason to enforce other businesses into doing certain things as they aren't a distributor of such content. They merely act as the intermediary between the customer and the site/person selling a given product.
Gumroad is solely acting on their own primarily in attempts to abid by law, by going the most extreme route about it. Which is total annihilation of the data, which Kemeno is currently doing what they can to ensure doesn't fully happen so that people can still access various things that were or still are on gumroad without worry of it getting yeeted by Gumroad being paranoid about being put out of business by the law for having allowed the distribution of nsfw content on their platform into states where you require ID verification to do adult stuff on websites anyways that have any level of updated regulation to such.