Privacy policy is vague and when pressed on if he would sell user data along with the service if he sold it, Eric Migicovsky was silent.
He sold Pebble and screwed the workers on the way out.
So how soon does he sell this when it isn't profitable enough for him? What use is a privacy policy if it can be changed by whoever he sells it to?
Also from what I understand if you aren't running your own iMessage bridge and using theirs, technically they have access to your username/password or password hash for the service.
Personal experience: Was on waitlist for over a year. Got an email for onboarding. Told to join zoom call. Zoom call notifies me it will be recorded. There was no previous notification from Beeper that they would be recording onboardings. I declined and hung up the call.
It took them days to reach out and offer a non recorded session. At that point I asked if they would answer privacy related questions and they ignored them. No response. I declined to use their service since.
Personal opinion, with all these sketchy things about Eric Migicovsky and privacy, I'd err on the side of spinning up my own Matrix server and bridges, you know, with blackjack and hookers.