[dcbadacd]

People looking at data often ignore that every user uses a specific subset of the total subset of features or content.

Just as a simplistic example, user set A wants content `x` and `y`, user set B wants content `y` and `z` - data shows that `y` is popular, but by removing `x` or `z` they make those users very reluctant to continue using the service.

I've seen it multiple times with services I use where only the common set is kept and then people start loathing and leaving the service.