[tyre]

Copilot is not doing what your example does.

If Github had a service that automatically mirrored public repositories on Gitlab, that would be equivalent to the example you gave.

But Github is taking content under specific licenses to build something new for commercial use.

I'm not sure if what Github does falls under Fair Use, but I don't know that it matters. I can read fifty books and then write my own, which would certainly rely—consciously or not—on what I had read. Is that a copyright violation? It doesn't seem like it is but maybe it is and until now has been impossible to prosecute?

[nojito]

GitHub isn’t building anything.

The end user is.

By this logic any and all neural nets that draw pictures are copyright infringing as well.

[saati]

If they create exact copies of copyrighted pictures, then yes, they do.