Let's imagine this as a building block for a bigger product. A web server may be interested to verify that a request comes out of a Google proxy server. Would

Let's imagine this as a building block for a bigger product. A web server may be interested to verify that a request comes out of a Google proxy server. Would it ever make sense to treat differently the requests that come from the Google servers? Or allow only them? If a publisher could verify that a user is using Chrome, is a user more valuable because tracking them is more robust? Another reason, if those servers recognize and stop the DDoS attacks, it can be cheaper to allow only them than pay for Cloudflare.