Polling vs. Webhook for Number Detection: Tiered by Task Volume and Latency Tolerance

For daily detection volumes of tens of thousands requiring real-time CRM write-back, Webhook is the standard mechanism to reduce network overhead; but for small batches or intranet environments, polling is more deterministic. This article explains Meta's 5-second response window and subscribed_apps binding rules, providing a four-step troubleshooting checklist and idempotency keys to prevent duplicate charges.