I think it's just as likely that the people with grievances to air are far more likely to be listened to once an initial scandal breaks. As soon as the first tale hit the mainstream news, every editor and reporter suddenly had a reason to publish an otherwise ignorable story.

Top execs leaving is more easily explained. This is the time if you have skeletons in your closet, assuming the internal investigation is real, before your dirty laundry is aired in the national news. And if you see this as Uber's death knell better to bail before it tarnishes your own rep to have worked there.