Can you please publish the extension on Open-VSX, so it can reach more users?
https://open-vsx.org is an alternative to VS Marketplace, that can legally be used in Visual Studio Code forks like VSCodium.
Of course, you don't have to change anything in the extension itself.
The process is pretty much the same as publishing to VS Marketplace.
It can even be automated, see:
https://github.com/open-vsx/publish-extensions
Though the preferred solution for such a situation is to convince the maintainers to start publishing themselves, you can add the extensions here to have them published by our CI workflow.
You can claim ownership of your namespace hbrok, and officially support the extension there.