They'll be released to the public starting in November after more content has been added for supporters.
The reason there isn't much new public content right now is because of a hiatus a couple months ago and I made the whole game public because I don't want content to stay gated for too long. But the usual cycle is that new content is supporter first and becomes public a couple months after that. There will also be gameplay updates, which will release for everyone from the get-go.