Genuine question: If you make your "nostr" account on ZBD, there's no way to use your account with another nostr client? And if you have a separate nostr public/private keypair, it is not possible to use that on ZBD? 

I don't get really what's the point of using nostr then. they didn't read up on the spec before implementing?

nostr:note1tul909994vk5sjdkkplc25zu372yyhwfhg8snmd3cf5kmwsgtl8ssxwj7