Exactly.
> Second, they should be using the public suffix list (https://publicsuffix.org/) to avoid having their entire domain tagged.
NO, Google should be "mindful" (I know companies are not people but w/e) of the power it unfortunately has. Also, Cloudflare. All my homies hate Cloudflare.
It is mindful.
... by using the agreed-upon tool to track domains that treat themselves as TLDs for third-party content: the public suffix list. Microsoft Edge and Firefox also use the PSL and their mechanisms for protecting users would be similarly suspicious that attacks originating from statichost.eu were originating from the owners of that domain and not some third-party that happened to independently control foo.statichost.eu.