Actually, the faq in the ZCash blog post (https://keybase.io/blog/keybase-and-zcash https://keybase.io/blog/keybase-and-zcash) has a way to sign up for keybase.

Actually, the faq in the ZCash blog post (https://keybase.io/blog/keybase-and-zcash https://keybase.io/blog/keybase-and-zcash) has a way to sign up for keybase.io immediately.