Correlation only. Reps choose which accounts get a CSC and they favour the ones they expect to keep, so selection, account size and reverse causality all inflate or distort this gap. Each opco page holds the same comparison inside contract-value bands, which is the closest thing to a control this data supports. A clean answer needs a holdout trial.
Share of each opco's maintenance clients with at least one CSC in the analysis window. An opco that does not record CSCs is shown as not tracked, not as zero.
OpportunityType 'Contract') overlapping the window.SalesType "Renewal" opportunities that reached Won or Lost, not inferred successor contracts.