More than a century ago, John Wanamaker famously said, “Half the money I spend on advertising is wasted; the trouble is I do not know which half.” The line still resonates as radical accountability becomes the new operating standard for marketing departments. Zero based budgeting and ROI mandates dominate planning cycles as spend stagnates or contracts, yet expectations for growth continue to rise. Activity is no longer an acceptable proxy for progress.

At the same time, many marketers knowingly and happily rely on an outdated and flawed tool. Last click attribution prioritizes what is immediately measurable, which can distort investment toward instantly gratifying channels like search, CRM, and display. The risk is nuanced but real. This short-term calculus can erode the flow of new customers and can hide that decay until the pipeline collapses. It may sound alarmist, but one of our most urgent responsibilities is to balance our measurement models to build resilient brands. The path forward is practical and within reach.

Time decay attribution works well for nurture-heavy categories with longer consideration cycles, while position-based attribution often provides the clearest picture for brands that require multiple touch points.

Second, layer in a marketing mix model. MMM has seen a resurgence as cookie deprecation threatened user-level visibility. These privacy compliant models use aggregated, time-stamped data to provide a long-term view and now deliver faster, more actionable insight through AI.

Third, introduce incrementality testing as a truth layer. Controlled experiments with test-and-control groups will reveal the actual causal effect of your marketing. Finally, re-examine the KPIs you hold highest. Shift your mindset from conversion to contribution and treat metrics like CAC and Retention Rate as central to evaluating your go-to-market strategy.

This is the moment to count what truly counts.