Night School Studio sent out an email to owners of Oxenfree on itch.io, to notify that it's going to be completely removed from the store on October 1st.

Luckily it’s DRM-free. Back up your installers. I wanted to call attention to this, because in a very unusual move, it’s being removed even for people who own a copy, whereas usually stores will only remove a game from sale and still host the files for existing owners to download.