If you were serious about limiting who uses your services you'd use an allowlist of ASNs. Even then, what about users using US-based residential proxies?

ASNs can obviously span multiple countries, and aren't a great way to gate this at all. While we block ASNs we KNOW are owned/operated by companies in limited countries, but I couldn't imagine a worse way to approach it at scale. Hate doing it, it's heavy-handed and wrong.

ASNs aren’t going to cut it. Google “residential proxies”