This issue is not about free vs proprietary software. I am not saying that competitors to a GNU package are unjust or bad -- that isn't necessarily so. The pertinent point is that they are competitors. The goal if the GNU Project is for GNU to win the competition. Each GNU package is a part of the GNU system, and should contribute to the success of the GNU Project.
Thus, each GNU package should encourage people to run other GNU packages rather than their competitors -- even competitors which are free software.
http://thread.gmane.org/gmane.emacs.devel/191030

RMS, суть швободки