I don't really know what to say, but I think in one way, keep the game free until version 1.0.0, but may I would suggest like a pre order bonus for anyone who pays at least $20. For example, maybe add some kind of art pack containing high-resolution VN arts of the characters, maybe as well as concept art for the game or older art that were in the game until they were updated or removed (for example, Jill's old design before the redesigns). And then once version 1.0.0 is released and is moved to the paywall, people who "pre-ordered" should have access to download the full game.
It's just an idea that I thought of since many people are concerned about the paywall. Regardless, I hope to see more new great content on this wonderful game, and I hope to continue supporting the game as much as I can.