I was also, briefly worried about this, but then I realized:
I have exactly zero piece of information on this forum that I mind being recorded.
Anyway, the only thing that's probably not already logged by the Internet Archive (and therefore the eternal property of well, everyone who wants a copy) are private messages, and I only use those to avoid polluting the threads with ephemeral stuff, never to actually hold private conversations.
Edit: also I've been checking out the company's website and I'm impressed by what I see so far.
Nice services, though a bit too expensive for my personal usage.
Good ethos and geek-friendly tools.
They also support great Open Source projects including Debian, Openstreetmap, Libreoffice and Kodi!