Survival curves for contract and usage over 36 months. Contr

Survival curves for contract and usage over 36 months. ContrSurvival curves for contract and usage over 36 months. Contract survival drops in steps at each annual renewal; usage survival declines steadily and sits below the contract curve, leading it.100%75%50%0Renewal 1 (month 12)Renewal 2 (month 24)36Months since contract startContract survivalSteps down only at renewalsUsage survivalDeclines between renewals and leads the contract curve by monthsGap between the curves:accounts paying, not using

Illustrative contract and usage survival for one cohort. The contract curve moves only at renewal, so it reports trouble late. The usage curve shows the same trouble months earlier, while there's still time to act. The gap between them is the at-risk base.