Vendor Churn Exposure Window

Vendor Churn Exposure Window is the gap between the day a third-party service changes terms, pricing, or availability and the day an agency discovers it. That gap is where client deliverables quietly break. The window widens when agencies monitor only uptime and ignore commercial and contractual drift. A ClipJury audit found 105 of 175 AI tools changed monetization-relevant terms between June 23 and October 3, 2026, roughly 60% in 15 weeks. Uptime dashboards would have shown green the entire time. Agencies should treat vendor health as two tracks: operational status (status pages, dead-letter queues, database waits) and commercial status (terms, pricing, deprecation notices). Tools like The Standup fold releases, CVEs, and breaking changes into a daily digest, while OutageDeck covers the live status half. Narrowing the window turns monitoring into a retainer defense: you can renegotiate scope or migrate a client stack before a deliverable fails, not after.