[mmh0000]

If I'm understanding this correctly, it's very closely tied to Google services, which makes it unusable for me because I don't have a Google Account.

Are there any plans to add support for non-Google email addresses?

Otherwise you may consider renaming to "GmailBTC"

[esaminu]

Will definitely prioritize this. The protocol supports adding any oauth provider and someone already forked the smart contract and added lastlogin https://github.com/elliotBraem/lastlogin-chain-signatures so this should bubble up to the application level soon! What email services would you like to see added?