I wonder if this is even legit... It isn't obvious who's behind it, and it
seems too good to be true. I'd suggest being cautious.
I also noticed that section on DVD decryption in their FAQ
(http://puri.sm/faq/) seemed kind of familiar. It turns out that a couple of
paragraphs from the Enable DVD Playback page were copied from Trisquel's wiki
and published with some minor changes.
The original wiki page: https://mediacru.sh/b_LFVDVnHU7J
(https://trisquel.info/en/wiki/enable-dvd-playback)
The DVD section of the FAQ: https://mediacru.sh/eklkwc5tLZxU
Everything in Trisquel's wiki is licensed under the GFDL, but Purism has not
complied with the license at all. Purism's copyright notice:
https://mediacru.sh/5m88RcPJtiVp