Keybase, please just support web of trust already. In some way. Not everyone I want to be able to authenticate necessarily has public social media accounts.
#1. Host a file on your site
You can host a text file, such as yoursite.com/keybase.txt. This is preferred, if you have a website.
#2. Set a DNS TXT record
Instead of hosting a web page, you can place a keybase proof in your DNS records.
Not necessarily. I'm talking about people who want to remain anonymous (or pseudonymous) and might want to keep as low a public online profile as possible.
It should be possible to augment the existing proofs with the WoT relationships, which could be valuable in a small number of cases.
However, it wouldn't surprise me if more people started using Keybase because of this one blog post, than have ever used PGP's web of trust features.