Note: Adtriba Sphere is a legacy feature that we continue to support but no longer sell. The latest version of this feature is available as Funnel Measurement.
If you are already using Funnel Measurement, find more information here. To upgrade, contact us.
This article explains how Adtriba Sphere calculates marginal CPA using saturation curves.
The relationship between marketing investment and return typically shows diminishing returns to scale.
The more you spend, the less return you get as the channel becomes more saturated. Adtriba calculates this relationship during modeling and displays it in the saturation curve panel.
The performance table also includes marginal CPA. This KPI reflects source saturation. The more saturated a source is, the higher the marginal CPA. Look for sources with a low marginal CPA compared to other sources. Scale your budget up or shift budget to those sources.
