Table of Contents
Why backend leaks kill long-term ROI
The invisible drain
Most marketers watch the front end closely.
Clicks. Conversions. Cost per acquisition. Day-one ROAS.
Meanwhile, the backend quietly leaks.
These leaks rarely show up immediately.
CBSplit was built to surface them before they destroy long-term ROI.
What backend leaks actually are
Backend leaks are not always obvious failures.
They include:
* High refund rates * Retry-dependent approvals * Subscription churn * Failed rebills * Silent payment declines * Chargeback exposure
Each leak may seem small in isolation.
Together, they erode profitability over time.
ROI is calculated early, damage happens later
ROI is often calculated using:
* Initial revenue * Blended EPC * Early conversion metrics
Backend leaks occur after:
* Fulfillment * Customer experience * Billing cycles * Support interactions
By the time backend damage is visible, scaling decisions have already been made.
CBSplit recalculates ROI after outcomes settle.
Refund leaks distort LTV projections
Refund-heavy funnels inflate early revenue.
They reduce:
* Net earnings * Cohort stability * Long-term margin * Processor trust
Short-term ROI looks healthy.
Long-term ROI collapses.
CBSplit adjusts projections using refund-adjusted revenue.
Rebill leaks compound silently
Subscription funnels rely on rebills.
Backend leaks include:
* Failed rebills * Grace-period churn * Card expiration losses * Payment friction
Each missed rebill reduces lifetime value.
Compounded across cohorts, the impact is significant.
CBSplit tracks subscription durability over time.
Retry leaks increase fragility
Heavy retry reliance:
* Masks front-end weakness * Increases processor scrutiny * Creates unstable revenue patterns
Revenue that depends on repeated recovery attempts is fragile.
CBSplit distinguishes clean revenue from recovery-driven revenue.
Backend leaks distort scaling decisions
When backend health is ignored:
* Traffic is scaled prematurely * Budgets are increased too aggressively * Risk accumulates silently * Processor thresholds are approached unknowingly
Scaling amplifies leaks.
CBSplit ensures backend stability before expansion.
Aggregated dashboards hide backend damage
Traditional dashboards blend performance.
They smooth over:
* Cohort differences * Segment-level refund clusters * Traffic-specific churn * Payment behavior patterns
Blended averages mask backend erosion.
CBSplit preserves granularity to expose it.
Long-term ROI depends on backend integrity
True long-term ROI requires:
* Refund containment * Rebill stability * Clean approvals * Durable customer alignment
Front-end performance alone cannot sustain growth.
CBSplit aligns ROI measurement with backend truth.