> a project that begins open, advertises their openness to the world, uses their openness to attract lots of community interest and then suddenly becomes closed

Do you have any examples of that happening? When I click on the link at the top of this thread it takes me to a GitHub repo with a bunch of Apache licensed code that is open to anyone that wants to use or modify or build off of however they want. Heck, with permissive licensing like that you or I could fork it and put any part/all of that code into a proprietary product and make money off of it if we wanted to, and that would be entirely in keeping with the spirit and practice of FOSS.

This project seems perfectly open from what I can see, looks like the original devs stopped working on it though