You're not missing anything, the public version is limited to this choice only. I updated the file, and it should be clear now, sorry for the confusion!
No, the Patreon version won't be available for purchase. It is because most of the extended game will be eventually released as Interactive Fiction, and in the meantime, I wanted to share the extra stories that don't change the storyline/endings as a reward for the immense support I received from my Patrons. I understand that not everyone is happy with my decision, but I feel like it would be unfair towards my Patrons if I were to share the extra content, even in a paid DLC. I hope you understand my reasoning. <3