With this little gem of training, you will learn the secrets how to keep your Blogs on the same server and Google is none the wiser! I go through it rather quickly, but you can pause and replay until you get it done right! Keep a safe brand new Cloudflare Account for each domain and you are good to go!
Is it absolutely necessary to use Cloudflare on every domain? So does this mean that I can’t use subdomains which therefore means that I need 50 separate domains. Am I missing something?
You can setup a wildcard subdomain on Cloudflare. Create a *.yourdomain and point it to your server.