GreyNoise has identified a “rotation economy” where threat actors continuously harvest, lease, and discard IP address space at a speed that outstrips traditional reputation services. By leveraging cloud providers, compromised IoT devices, and short‑lived VPN endpoints, attackers can assign a fresh, clean reputation to each new address, rendering static blocklists obsolete almost as soon as they are published.

For small and mid‑sized enterprises, this rapid churn means that relying on manually curated IP deny lists leaves large gaps in protection and can even introduce false confidence. Defenders must adopt dynamic, data‑driven threat feeds that incorporate real‑time telemetry, behavioral scoring, and continuous reputation updates to keep pace with the rotating IP landscape.