Marketing Attribution Principles
Why Last-Touch Attribution Fails
Traditional advertising platforms and analytics default to Last-Touch Attribution (LTA), creating dangerous blindspots for growth marketing leaders:
- The TOFU Starvation Trap: Channels that build initial demand (Meta video, influencers, SEO blogs) appear to have low ROAS under Last-Touch, leading managers to defund them.
- The Brand Search Illusion: Branded search ads often report 15x ROAS simply because customers search the brand name at the moment of purchase, claiming credit for upstream awareness.
- Position-Based Balance: The U-Shaped (40/20/40) model rewards both the creator of demand (first touch) and the closer (last touch), while giving credit to middle nurture emails.
Measure customer acquisition payback in the CAC Payback Lab.