The Blended ROAS Trap: The Average Fallacy: Why Blended Metrics Mask Systemic Failure
A “good” blended ROAS often hides a catastrophic cash burn in specific campaigns. This is the Average Fallacy. Engineering requires granular visibility, not weighted averages. The Danger of “Surface-Level Optimization” Agencies rely on basic metrics because they lack deep visibility. A 7x blended ROAS might hide a 15x branded search campaign masking a 0.5x prospecting […]