Yes, Chapter 3 is planned to slowly roll out as a free demo as well. The later chapters will likely remain patron-only until the full release. I'm planning on getting the first part of Chapter 3 uploaded here soon. I wrote a bit about it in my latest devlog here; the game currently has a bunch of placeholders and mixed art, and I'm looking to revise all of that. It's an awkward time to release the free demo now, but it shouldn't be much longer.