First response: It doesn't matter if I use copilot right now. It matters if I will ever use copilot in the future. Opting-out is future-focused. What if I said "no, I don't use copilot, so I don't need to opt out", then a year from now start using copilot, completely forgetting about this whole debacle? That's the evil of opt-out. My inaction only benefits them, never me.
Second response: Maybe? I press the little button to auto-generate commit titles and messages that showed up in my Github Desktop. Does that count?
I'm asking sincerely. I don't "use Copilot" as in using it in VS Code or while writing code, so I'm honestly not sure if I am.
Do we get a choice? I did not ever explicitly enable it yet GitHub's web UI by default uses copilot to autofill my web-based edit commit messages. It also shows up on the home screen by default now.
I'm pretty sure if you use the site you're using GitHub Copilot in some way, so your question becomes irrelevant.