I don't think this is a good idea if you have lots of visits, as Cloudflare might ask you to upgrade to a Business account which is very expensive. It's excellent for small sites and blogs which are static, but for anything visited often, like a Docs site for some popular project, it might get dropped from CF's network. Don't quote me on that, I haven't experienced it, but I heard that they do ask people to upgrade, for example Brian Fritz of omdbapi.com, who had to close down the service to the public because of huge amounts of traffic, and that's just with text, not serving images or video...
