[TeMPOraL]

I don't think it's about "showing you're doing your job", but it very much is about metrics.

Imagine your metrics are perfect. Think of what your goal is: to get that sweet $$$. Using metrics, you'll tune your app towards extracting as much value as possible from customer. Note that it's different from providing value to customer in exchange for money - the latter is just an early stage of the former, and as you optimize further (using your perfect metrics), the only way to squeeze out more profit is to start making user's life worse.