So this is about the introduction of a new identity service. From what I get looking into Keyoxide it basically strives to be what Keybase originally intended to be.
From their Keybase migration guide [1]:
"Keyoxide as a partial replacement for Keybase
It's important to moderate expectations and state that Keyoxide only replaces the subset of Keybase features that are considered the "core" features: message encryption, signature verification and identity proofs.
Message decryption and signing are not supported features: they would require you to upload your secret key to a website which is a big no-no.
Encrypted chat and cloud storage are not supported features: there are plenty of dedicated alternative services.
If you need any of these Keybase-specific supports, Keyoxide may not be a full Keybase replacement for you but you could still generate a profile and take advantage of distributed identity proofs."