Thank you for bringing this issue to my attention! I looked into it and it seems as though it's because of itch.io changing their policies around completely free NSFW games vs the "donate $0 or more" games. I updated the settings so it doesn't accept any payments through itch.io. Here's a link if you want to read more about it!
https://itch.io/t/5149036/reindexing-adult-nsfw-content
However if you want to donate or show your support, please check out my patreon and consider becoming a member! That being said, it's completely optional, though you will get access to the patreon exclusive version that has more content than the free version!
https://www.patreon.com/c/phantomlegume