The real issue if find about that, is StartUp with this kind of thinking tend to put number before people or actual results. And most of the time, you cannot reduce problem or solution with crunching number.

Once the breach is opened, it became a nightmare explaining your coworker that a small drop in Session does not probably need a complete restructuration of the website.

Currently working in this kind of startup, doing a good job is actually impossible as we changed everything every 3 month or so, because number changed in analytics.