I'm also late to this article, so maybe this was a bug that was fixed.
All I see there is a button that says “Enable GitHub Copilot”.
Do you have any public repos? Also, I did apply for the beta but I'm not sure if I was ever accepted, so maybe that is why I have the option. I've definitely never paid for anything though. https://i.imgur.com/KBRUSFa.png
I do have public repos. Perhaps that setting there is about sending snippets from the editor? Unsure. But I definitely don’t see that.