While we allow nudity and for creators to push the boundaries of art, we also have guidelines against funding pornography on patreon. In our community guidelines: We define pornographic material as real people engaging in sexual acts such as masturbation or sexual intercourse on camera.
Interstitial pages are pages that pop up when you intend to go somewhere else, but need to complete an approval process, like the “I agree to the EULA” page
Edit: an 18+ interstitial would just be one that asks if the person is 18+
