So we agree that the answer is “yes, Purism has full access and no, it’s not encrypted”? And we agree that this holds not only for public posts, but also for any private messages sent using Mastodon/Librem Social?
Because that’s what the op asked about, and I think it’s a valid question. Anyone could be lead to believe that private messages would be encrypted. Especially since it seems Purism removed the local and federated timelines, so the visible messages could look like a private conversation among friends.
Let me quote yourself, too:
In this case, my impression is that you sneered at an honest question while providing an answer that was not entirely helpful to the op.
This surprised me, because I have great respect for the quality and sheer number of replies you provide to this forum otherwise. I assume you just happened to act a little too fast this time.