Cache your images longer at cloudflare's edge: New Page Rule -> your.site/*.png (or jpg, gif, etc) Cache Level: Everything Edge Cache TTL: (some large va

Cache your images longer at cloudflare's edge: New Page Rule -> your.site/*.png (or jpg, gif, etc) Cache Level: Everything Edge Cache TTL: (some large value, an hour maybe) This will make sure you don't serve any given image more than once per hour, and the rest of the requests will get served CF's edge cache.