Fastest signal · weakest moat
Paid Acquisition Loop
How it compounds
Paid drives patients → patient data improves model targeting → server-side conversion signal sharpens lookalikes → blended CAC drops → reinvest savings into channel expansion.
The cycle
- 01 Run paid with proper CAPI / hashed events
- 02 Cohort-tag patients in attribution layer
- 03 Feed M3-retention signal back to platform
- 04 Optimize for retained patients, not signups
Multiplier
Bid on retention, not conversion. CAC drops 20–40% over 90 days.