Marketing Attribution & Revenue Cannibalization

High ROAS can hide demand capture, not creation. Use incrementality and marginal ROAS to measure real growth and guide smarter spend.

What Happened

Search Engine Land published analysis showing how strong ROAS metrics can disguise whether marketing campaigns actually drive new demand or simply capture existing intent. The piece highlights how advertising platforms excel at finding the easiest path to conversions, often becoming expensive touchpoints in journeys already destined to convert. eBay's famous brand search experiment exemplifies this, when they paused brand PPC ads, organic traffic absorbed most conversions with minimal revenue impact.

Why This Matters for B2B Marketing Leaders

Your demand generation programs may be cannibalizing organic conversions rather than expanding your addressable market. In B2B contexts where buyer journeys span months and multiple stakeholders, this attribution challenge becomes acute. Performance Max and similar automated campaigns optimize for conversion probability, not incremental lift, potentially inflating your cost per acquisition while shrinking actual pipeline growth. Without incrementality measurement, you risk budget allocation decisions based on vanity metrics rather than genuine demand creation.

The Starr Conspiracy's Take

This attribution blindness explains why many B2B marketing teams struggle to demonstrate clear ROI despite impressive dashboard metrics. The solution requires implementing incrementality testing through holdout groups and measuring marginal ROAS to guide budget allocation decisions. Consider how demand generation measurement frameworks can help distinguish between demand capture and demand creation activities. Smart marketers are shifting focus from last-touch attribution to causal lift measurement, recognizing that the most efficient conversion path isn't always the most valuable for long-term growth.

What to Watch Next

Expect more sophisticated incrementality testing tools to emerge as marketers demand proof of causal impact. Privacy regulations will likely accelerate this shift away from attribution modeling toward controlled experimentation. Monitor how your automated campaigns perform when you pause brand search or retargeting components.

Related Questions

How do you measure incrementality in B2B marketing campaigns?

Set up controlled experiments with holdout groups receiving no ads while measuring conversion differences. Use geo-testing, audience splits, or time-based holdouts to establish causal relationships between campaign exposure and outcomes.

What's the difference between attributed ROAS and incremental ROAS?

Attributed ROAS shows platform-reported revenue per dollar spent, while incremental ROAS measures additional revenue generated beyond what would have occurred naturally. Incremental ROAS accounts for organic conversions and baseline demand.

When should you prioritize demand creation over demand capture?

Prioritize demand creation when your total addressable market needs expansion or when competitors dominate existing demand channels. Focus on demand capture when market share battles intensify or when you need immediate pipeline velocity.