Abandoned Cart
The intent signal. A user adds an item to their cart but does not check out within a threshold window. The cart itself is a strong intent signal — stronger than browsing or wishlist behavior in most ecommerce contexts.
The standard ROI assumption. It would seem that reminding a user about a cart item should always have a positive impact. In practice, abandoned-cart use cases generally do show high ROI.
The counter-intuitive risk. What if the "reminder" happens too frequently? What if it happens in a situation that distracts or annoys the user — pushing them to remove the notification from the mobile app, or to clear out the cart entirely so they don't get a pop-up when they reopen the app? One experiment is worth a thousand expert opinions — even high-confidence use cases need data feedback to confirm net impact (source.cdp-recommendation-agent-md).
Why this use case matters for the agent. It's the canonical example for explaining ROI uncertainty even on "obviously good" use cases. Architectural decisions assuming positive ROI from intent-based activations should be paired with measurement infrastructure capable of detecting fatigue effects.