Gyms: convert trials to members. Catch lapsing members before they cancel.
Auto-SMS trial members on day 3, 7, 14 with class invites + onboarding nudges.
No check-in for 14 days? Auto-nudge with class suggestions. Recover 25% before they cancel.
Empty seat in tomorrow's 6am? SMS-blast wait list. 90% fill rate within an hour.