Estimated impact
15% drop in retention, affecting mid-lifecycle users (60–90 days), with downstream impact on engagement and LTV.
What’s happening
Retention fell from 68% to 53%, starting December 12. The drop is concentrated among users who joined 60–90 days prior.
Root Cause
A GitHub deployment (#76051a0) removed an email reminder feature that previously drove ~70% of Day-60+ re-engagement. Affected users show a 90% decline in login activity.
Recommended Action
Revert the email reminder removal or ship an alternative re-engagement mechanism. Monitor retention and login activity over the next 7 days.
Evidence Trail
GitHub commit (#76051a0), user_activity table, email_events table, cohort retention analysis.
