I had the same gripe about working at Twitter- the two main metrics were daily a...

I had the same gripe about working at Twitter- the two main metrics were daily active users and user active minutes. User research was way understaffed so a lot of the side effects of optimizing metrics remained unchecked

Edit: I wrote “The vanity metric paradox” a while ago to express it more clearly http://dimitarsimeonov.com/2018/03/23/the-vanity-metric-para...