It was not directly a reply to that case, it was meant to say that even if the license was GPL so that a proprietary fork was forbidden, a CLA could make it so that only the owner of the project is allowed to use your contributions as proprietary.
It was an example of a case where a CLA could have caused what was imputed by the original comment.
It was an example of a case where a CLA could have caused what was imputed by the original comment.