Customer's invoice included $612 overage charge for exceeding 10,000 included runs by 61,200 ($0.01/run). Root cause was a duplicate webhook subscription in customer's CRM causing 'Lead enrichment v2' to fire 50x normal volume. Customer fixed the duplicate subscription. Agent applied 50% goodwill credit ($306). Customer was unaware of pricing because automated usage alerts at 80/100/125% were filtered to a folder.