This.
They also have a form to submit AI crawlers.
CloudFlare can also easily maintain an anti AI crawler service completely by itself if it takes a fee on top of their pay per crawl functionality. However, considering CloudFlare already has all the tools and infrastructure to do this cheaply, providing a good service wouldn’t be too hard.
I use a Hetzner Storage Box as extra storage to my Hetzner VPS. It almost feels like the storage is directly attached. We serve thousands of archives and binaries and have absolutely no problems. It’s fast and decently reliable (except some downtime I once experienced). The initial file access time might not be the best but the bandwidth is great.