> IMO they really messed up by tracking and using time spent on page per day (or something like this) as a metric FWIW, in my time at FB from 2019-2021, we wer

> IMO they really messed up by tracking and using time spent on page per day (or something like this) as a metric FWIW, in my time at FB from 2019-2021, we were explicitly disallowed from using time on app as a success metric for the products my team worked on. Instead, we focused on the utility of the experience as the goal, i.e. people finding the product useful was more important than simply using it. I wasn't working on the newsfeed though, so I'm not sure if that applied to that part of the app.