@osi @josh @jpaskaruk this is particular case and it is completely dependent on developers. and nobody prohibits to make a fork at any moment, note this. projects with mixed licensing exist and are quite many. they started as forks.
and particular cases are particular cases. for instance, Gnome is "free" and total BS at the same time, trying to impose it on everybody in open source world. worse than any corps and/or RHEL and its useless-d. it's very difficult to get rid of Gnome in Linux-based systems. and useless-d is removed easily and many distributives use different init systems, etc.
examples are numerous. the matter is not the crew of developers but the availability and quality of the code. code is the only thing that matters when it comes to software. if you dilike what some developers do - fork it and write your own version, simple. and sometimes open source is better than so called "free" code in that sense. it has more consistent development and better code quality.