Observed Signal · Oct 1, 2026 · Market Signal · Source: Brainlabs · Impact: 2/5
The ROAS Trap: Why Efficiency Alone Won’t Drive Growth
A high ROAS can hide an over reliance on existing demand. Learn how to balance efficiency and incrementality to drive sustainable growth.
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Over-Optimizing Campaigns Can Stunt Marketing Growth
The MarTech article argues that excessive optimization for metrics like ROAS and CPA can limit long-term growth by capping volume and reducing future scaling opportunities. Using examples (e.g., raising ROAS from 7x to 10x by narrowing audiences), it shows how efficiency-driven decisions can eliminate lower-performing channels that feed future pipeline and cross-sell potential. The piece recommends separating growth (acquisition) and efficiency (retention) targets, optimizing across channels rather than in silos, and measuring with broader context — overall CPA, efficiency floors, funnel-specific KPIs, and lifetime value. It advises using paid media to drive entry-product demand while CRM, email and retargeting handle cross-sell and retention, and cautions that optimizing a metric alone is not the same as optimizing for business goals.
Performance Marketing Needs More Than ROAS
The MarTech contributor argues that return on ad spend (ROAS), while useful for short-term efficiency, is insufficient as the sole measure of marketing success. Marketers should shift from campaign-level ROAS to business-level outcomes—such as customer acquisition cost (CAC), customer lifetime value (LTV), incrementality, retention and loyalty—and adopt holistic measurement approaches like media mix modeling (MMM) and multi-touch attribution (MTA). The article also recommends investing in first-party data, predictive models and experimentation frameworks to address signal loss and privacy-driven measurement challenges, and calls for cross-functional alignment to translate marketing activity into revenue and strategic business outcomes.
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