I had never put anything in GitHub, but I have done and still do read stuff on GitHub.
My reasons though are not because of Copilot. It is because I do not use git for my own projects (I self-host Fossil and mirror on Chisel). But if someone else makes mirrors of my code on GitHub (or CodeBerg or SourceHut) then I do not have an objection to that (making more mirrors on different services may be better, anyways; unfortunately if you are using git then a header will be prepended to the file before computing the hash, which makes the integrity more difficult (although it is still possible, since the header is predictable (as far as I know))).
Seeing a few examples of output from Copilot (although I have not used it myself and do not intend to do so), they do not seem to be a very good quality. So, I think that it is not worth it, even regardless of licensing issues.
If you do move your project to another service, you should please use one which does not require JavaScripts enabled to be able to view the code (even if other functions do not work). Ideally it should also work without CSS. (For these reasons, GitLab is not acceptable.)
My reasons though are not because of Copilot. It is because I do not use git for my own projects (I self-host Fossil and mirror on Chisel). But if someone else makes mirrors of my code on GitHub (or CodeBerg or SourceHut) then I do not have an objection to that (making more mirrors on different services may be better, anyways; unfortunately if you are using git then a header will be prepended to the file before computing the hash, which makes the integrity more difficult (although it is still possible, since the header is predictable (as far as I know))).
Seeing a few examples of output from Copilot (although I have not used it myself and do not intend to do so), they do not seem to be a very good quality. So, I think that it is not worth it, even regardless of licensing issues.
If you do move your project to another service, you should please use one which does not require JavaScripts enabled to be able to view the code (even if other functions do not work). Ideally it should also work without CSS. (For these reasons, GitLab is not acceptable.)