> I don’t use windows, so most of this doesn’t affect me, but I do use GitHub and VSCode. Can anyone clarify, once and for all, whether “GitHub Copilot” and “VSCode Copilot” (sic?) are the same product? The documentation isn’t even clear, and it’s important because it affects billing. How do these two products interact and where do they NOT overlap?

There is no VSCode Copilot. There is Github Copilot integration inside VS Code.