Frequency waste rarely makes it into a delivery report, because each platform looks fine on its own. The waste lives in the gap between the platforms — where the same person is being hit, again, across channels that don't see each other.
Why it stays hidden
Platform reports are accurate within their walls. Outside those walls, a viewer who's already at the cap on linear can quietly get another 6 exposures on YouTube, another 4 on Meta, and another 2 on CTV — without any single platform showing a problem.
What it actually costs
On most plans we look at, total frequency waste sits between 10% and 25% of the digital portion of the budget. That money rarely lifts response further. It just keeps hitting the same people who were already going to respond.
How to find it
A cross-media exposure history makes saturation visible: by audience cohort, by week, by channel combination. From there, frequency caps and reallocation become straightforward — and measurable.