You are actually right. But our main goal is and always was Free Software.
When we created the Librebox we created it with Trisquel in mind, but it just
didn't catch up. We made some announcements and even post a topic on Trisquel
which received a lot of comments and views but nothing more, the project just
stagnated.
Then there was the Ubuntu MATE contact which helped us boost like crazy (at
least in terms of public acknowledge) and now almost everyone is talking
about us and the fact that we deliver a Free Software Friendly machine.
I talk personally with the person behind the Ubuntu MATE project, he knows
that internally at LibreTrend we only use Trisquel Gnu/Linux, and he knows
that for us allowing Ubuntu MATE was something which we hadn't planed at all.
But yet we found a deal, and everything work great. The result ? More and
more people are talking about Free Software and the importance of it, and we
didn't loose our purpose (and never will).
Yes, it's not ideal, but it worked, and for us it's really wonderful, mostly
because now we can continue our work on the LibreBox 2 (which will release in
Mid-2016) which will be, in my opinion, a revolutionary product dedicated to
Free Software.