It really sounds to me like someone is just spidering his site each night using curl and it's causing a cache refresh. He doesn't go into detail about the "547

It really sounds to me like someone is just spidering his site each night using curl and it's causing a cache refresh. He doesn't go into detail about the "547 hosts" to explain if they're all fetching the same content or if the whole site is just being fetched from a cluster of machines as the requests arrive at Cloudflare. But either way it sounds like he's misunderstanding how Cloudflare works.