Re: [Trisquel-users] Issues for Mir using the GPLv3 license

[lutheroto]

RMS addresses this type of issue:  
https://www.gnu.org/philosophy/selling-exceptions.html

Propietary re-licensing is not as good as a full copyleft, but it's certainly  
better than an MIT-style license because it prevents at least some people  
from making proprietary versions.