CAC to acquire the “next 15 members” Average CAC Retained after free trial Cost of Goods (COGS) Reactivated free trial Value 100 $15,000 (avg $150 per customer) 80 $187,50 --- – V2: Extended offer Value 125 $24,375 (avg $195 per customer) 95 $256,58 ($24,375 - $15,000) / 15= $625 Lift +25% +30% Increase in class redemtions +19% +37% relative --- Marginal CAC = $625 > ⅓ Lifetime Value (LTV)