I still don't get it. You have always been able to get a keybase proof for ANY website/domain without being approved first. Why do you need to whitelist mastodon instances? Why not just let people type in the domain name for their instance and get rolling?
Again…why? who cares? Why is picking from a pre-approved list better than just letting people type in their instance domain name and allowing every instance by default?
Agreed. Not to mention Mastodon could've a linkback to Keybase with all data pre-filled (username + instance name). For example in Settings a link "Connect with Keybase".
