@maksim >the devs restrict the main repository from proprietary software
I only remembered this point now, so I'll make it.
The Trisquel developers are not restricting such software - the proprietary software developers are the ones who have made a decision to restrict their software from being acceptable to use.

'But we are not excluding them from our community; they are choosing not to enter. Their decision to make software proprietary is a decision to stay out of our community. Being in our community means joining in cooperation with us; we cannot “bring them into our community” if they don't want to join.' - https://www.gnu.org/philosophy/pragmatic.en.html