I wouldn't have an issue with that if it was a private subkey. You could easily revoke it and replace it in case Keybase does something weird. But giving them p

I wouldn't have an issue with that if it was a private subkey. You could easily revoke it and replace it in case Keybase does something weird. But giving them private keys for master/primary key is not exactly sensible. For the record I don't have a private master key in any online connected devices. GnuPG works well in an air-gapped scenarios. Does Keybase client? Or does it require constant phoning home?