I know it's fun to hate on the big tech companies recently and act like they are bullies (and indeed in many ways they are), but this is a bad example of that. Most companies I know of would outright fire you if you, against explicit company policy, went to the press and started badmouthing your employer. The fact that Amazon only gave her a warning is the only surprising thing in this article.
My sympathies end when you get exactly what you were asking for from your employer in a negotiation and you continue bad mouth them to the press.
Appeals to authority all the way down.