I see. Well at least one or two features of H stuff is probably enough to let players know what their missing out on. Put up a big info-graphic saying that the H they are given is all that exists for the free demo, full version has more, so on.
I'm sorry I do not mean to over-ask. For an adult game demo, so much as one adult scene usually is not a lot to ask. Most free adult demos usually have multiple scenes available to entice the player to purchase the full game. My comment comes from being a developer myself. This is an alt account given that context obviously. But I do recommend demoing at least one, or just a fraction of one if your scenes are lengthy. Demo players thinking about buying sometimes need a sample of the hook of the product. Which by the itch page, appears to be animated adult content. This is just like the methodology many adult animators use. They preview just a portion of the animated scene, letting people know what they are in for and entice to purchase the rest.
I don't mean to info dump you, I am sorry for that. Just intended to throw a short tip, but I didn't expect the response I got. Will this change profits by hundreds of times? Probably not. Probably not even by half. But it is known to work with varying effect from creator to creator, and usually doesn't ever hold any downsides.
I mean well and I wish you luck!