Absolutely, but that is part of the ethical qualm. You are perpetuating the use of Github as the dominant (code) social network by using it.
If you continue to use it after Github has performed an act of censorship (or anything else that violates your values) and you continue to use the service then that act goes unpunished as they will keep their market share and may repeat that act again. After all, there weren't enough negative consequences to avoid doing so in the future.
If you continue to use it after Github has performed an act of censorship (or anything else that violates your values) and you continue to use the service then that act goes unpunished as they will keep their market share and may repeat that act again. After all, there weren't enough negative consequences to avoid doing so in the future.