As such, it can still be used to link a person to their Kagi account which means it's not private or anonymous in any meaningful sense. Additionally the service is only available to US citizens. I would strongly urge Kagi to consider adding cryptocurrency payments - ideally Monero.

This is coming from a paying Kagi customer. I like to put my money where my mouth is but I'm not a fan of the current payment options. I understand that Kagi is a small company in early stages, but I would expect cryptocurrency payments to be available 12 months from now.