Snap, Twitter and Uber have all had unprecedented amount of turmoil in the executive ranks of the company. Snap and Twitter's stock are both trading below IPO.

Snap, Twitter and Uber have all had unprecedented amount of turmoil in the executive ranks of the company. Snap and Twitter's stock are both trading below IPO. Uber is not public yet. It makes me wonder about the deeper causality. Do execs stay because of the mission and that causes stock appreciation? Or do execs stick around because of stock appreciation and then explain it through the mission?