How a D2C Brand Doubled Media Investment in 12 Months Without Breaking LTV:CAC
A European D2C brand with a complex digital and TV media mix needed to scale investment — but had no framework for managing spend across channels with different measurement characteristics. The Violet Attribution Prism aligned MMM and DDA into a single decision framework, enabling 100% media investment growth while maintaining LTV:CAC discipline.
When ROAS stops being enough
This European D2C brand operates a hybrid model — one-time transactions alongside subscriptions — and runs a complex media mix across digital channels and linear TV. The growth opportunity was clear: scale media investment. The constraint was measurement. TV partner attribution was isolated from digital team workflows. Digital channels needed real-time data to adjust bidding. A single-channel or last-click model was insufficient for a media mix this complex. And as a subscription business, the metric that mattered was LTV:CAC — not transactional ROAS.
The Violet Attribution Prism: MMM and DDA working together
We operationalized the Violet Attribution Prism — a dual attribution framework that assigns different decision contexts to MMM and DDA rather than treating them as competing methodologies. Strategic budget allocation is led by MMM, validated with incrementality testing. Channel mix optimization uses MMM direction, refined with DDA nuance. Campaign-level optimization is driven by DDA, calibrated via MMM. Creative optimization is DDA-led, validated through creative tests.
Geo-holdout and PSA incrementality tests provided causal validation to continuously calibrate both models. Areas where MMM and DDA diverged became the priority for targeted testing, creating a systematic feedback loop that improved decision confidence with every cycle. All performance targets were transitioned from CPA to LTV:CAC frameworks, with server-to-server tracking of predicted LTV signals in real time.
100% media growth with LTV:CAC discipline intact
Media investment scaled by 100% year-over-year while strict LTV:CAC thresholds were maintained throughout. The Attribution Prism delivered alignment across digital and TV teams that had previously operated in silos — turning cross-channel investment into a coordinated advantage. The weekly cadence of channel scaling or downshifting based on real-time LTV indicators gives the team confidence to continue scaling without breaking the unit economics that make the growth sustainable.
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