I've been a user and close follower of all things a Signal for over a decade. This person's blog is a little more than a hit piece, and makes wild exaggerated accusations which can't be proven. First and foremost of which is that Signal had any CIA funding. That's just absurd. Way back and it's early days Signal got an award from the "open technology fund" which is government money, but the government has no control over who gets the award. That money isn't even relevant anymore, Signal gets its funding from a donation from Brian Acton and donations from users.