It's worth clarifying that Itch themselves didn't come after NSFW content, it was their payment processors. Itch was basically forced to either restrict NSFW content or be cut off from banking and lose pretty much all revenue, which would mean shutting the entire site down.
So the real enemy is Visa and MasterCard, not Itch. This has been happening to hundreds of websites all over the internet. There's seemingly a strange unlikely alliance of old school Christian puritanism and stodgy "progressive" activism behind it, but ultimately it's all coming via Mastercard and Visa. It's pretty weird.
I totally forgot about that element involving the payment processors. If I remember correctly, the same activist groups that rallied to payment processors about NSFW content also tried to have LGBTQ+ stuff banned from media as well under the guise of 'protecting children'. It's scary how much censorship, bigotry, and oppression can be achieved under the false claim that it's all for the kids, or for some greater moral purpose.
Of course, the payment processors only responded and tried to have platforms ban NSFW to appease stockholders, and to continue making money. The largest issues are the fake activist groups using fake excuses to censor/ban things, and the corporations/politicians that capitulate.
If I remember correctly, Hitler also used the excuse of 'protecting the kids' for a few of the heinous actions he committed; even saying that if you want to easily get things censored or banned, then use the excuse that it is for a religion or for the kids because appealing to emotion is easier than appealing to logic. Scary stuff.