There should be a term for an engagement metric that looks better the more you annoy your users
9 replies and sub-replies as of Mar 12 2017

any metric w/o a counter-metric
DAU (Daily Abusive Users)
Prickthrough rate
mortgaged engagement
Time to close advertisement popup?
persistence return rate
that's called growthhacking™
Email unsubscribe count growth
DUA -- Daily User Annoyances.