> This seems very reasonable? If you want to attack your employer you are free to do so, why should they pay you for that?

She wrote the book after she left. So, is it OK for someone to expose a company for illicit and illegal activities in this regard? And if not then why is it OK for these companies to use illicit or illegal tactics to silence former, or even, current employees?

According to the article the gag order was part of her severance. So it's not as if she signed something before being employed, discovered something shady, and couldn't speak out. In this case, she saw something shady, signed an agreement not to say anything, but reneged on that agreement. I'm much less sympathetic to the latter than the former.