Rewarded ads need a failed-claim state

A UX note on claim failure states for rewarded-ad and virtual-currency systems.

The weakest state in a rewarded-ad loop is not the ad view. It is the moment after completion when the reward does not arrive. That state needs first-class UI: completed task, pending verification, failed claim, retry available, support route, and whether the campaign inventory has expired. Without that, users cannot tell whether they misunderstood the offer or the product lost their work. For virtual currency systems, failed claim should be treated like a payment failure. The user already paid with time.