Consider the following if you want to be more private:
Paying with Monero
Stripping off the comment section from your SSH public key (~/.ssh/id_rsa.pub, most likely). It's common to have user.name@host, which might look like John.Doe@mylaptop
While we can claim that this is generally a privacy oriented service, we may not always have the resources to fight legal requests in court, and often must comply with law enforcement. So please keep this in mind. These aren't servers in a bunker, in Greenland, guarded by mercenaries.