You really have to ask yourself what kind of place it is you're working for and what you're building, if a totally regular employee basically is paid hush-money to not speak about their job.
This isn't a private business any more, it's the mafia. People talk a lot about the culture of free speech and the rights of end-users, but we live in a world where a private company that builds a social media website, this isn't the NSA or anything, can stop an employee from speaking the truth.
It's time policy makers throw all of this out of the window, together with the anti-competitive non-competes that at this point affect IIRC, almost a fifth of the American workforce.