Nymchat takes it even further. No idea who you are. No way to associate your IP with pubkey. It can be run locally, circumventing anyone else. And when using Nymchat app it uses a Cloudflare proxy so all the relays think you’re Cloudflare. Even then, the proxy has no way of knowing your pubkey. Only that an IP was connected at such a time and that could grow to thousands or millions of samples depending how Nymchat grows.