In my opinion, the average non-linux user could care less where the software
came from, who made it, who owns it, or how much it costs. The average user
cares about weather or not a program will work and if their hardware is
compatible.
In addition people are afraid of change so most will be reluctant to make the
switch, especially to an 100% Libre distro which poses a few extra challenges
(especially when it comes to wifi, etc).
This reluctance to change is a problem that many distributions face in
getting more users. I would even venture to say that this is precisely the
reason why many distributions are not 100% libre, they are willing to bend a
couple of morals, include a couple of proprietary drivers, blobs, and
programs, for the sake of usability.
I am not a radical anti-nonfree software advocate. But I choose to use only
free software for personal reasons, and encourage others to do the same.
My point is, at the end of the day Trisquel is a hard sell for people who are
new to GNU/Linux, and it is even a hard sell for people who are veterans of
GNU/Linux. I think Trisquel sells itself. There is truly a feeling of
Liberation in knowing that you are able to use a computer without any
constraints on it. That is why I use it.