sommerfeld on Nostr: A "Private Blockchain" used to store pgp public keys of email addresses? Seriously ...

A "Private Blockchain" used to store pgp public keys of email addresses? Seriously wtf is wrong with you Proton??!
https://proton.me/support/key-transparency

1) Why a "private blockchain"? Why not just a database that you run on your servers?
2) Why are you reinventing pgp keyservers with absolutely no upside?