Now I'm glad I've not opened VSCodium in a few weeks; I prefer using Claude as a separate application anyways, will have to remove the extensions.
No evidence, but I do feel like the problem is going to be OpenVSX and not Anthropic.
OpenVSX does have an option to use OIDC instead of a long lived token for publishing. I get the feeling a lot of people use the forever-good-unless-revoked token though.