I find copyleft stipulations a bit overdone, personally. Software licensed under the Apache license can match Stallman's traditional definition of Free Software if the maintainer chooses to do so, and that's why it's considered a Free Software license. Even the GPL won't bring someone who doesn't care about free software into compliance; just take a glance at ffmpeg's Hall of Shame [1].

[1] http://ffmpeg.org/shame.html