I've seen the hazards of "raise the dead" campaigns before. You send out a campaign to your inactive users and get 20% engagement. Half of those are cancellatio

I've seen the hazards of "raise the dead" campaigns before. You send out a campaign to your inactive users and get 20% engagement. Half of those are cancellations. With 30% sleeper rate, you just immediately 3% of your users. Not fun. What I haven't seen is an analysis of the effect on retention rate. That's going to play out over time. Some of the users who cancelled were going to anyway and some people you reactivated were saved. It would be very handy to have a formula of what values make sense to send out these campaigns so you can stomach the short term loss for the long term gain.