@Qantumentangled I think the second way listed is better: 1. Use username.keybase.pub to post a link to mastodon for now and 2. Put that keybase.pub link in bio.
The signed messaged is just an "if you care to verify that I am who I say I am, here is a message to verify".
Completely optional as a temporary solution. Really it was just something to do here while still familiarizing with a new network.