There is a valid argument that special protections afforded by the government, and traditionally only granted to common carriers — very limited liability for us

There is a valid argument that special protections afforded by the government, and traditionally only granted to common carriers — very limited liability for user speech — incur a moral responsibility for those receiving those protections to operate in a manner that does not interfere in their users’ free expression. The U.S. Open is in no way similar. They are not a public platform, do not operate in any way resembling a public square or common carrier, and are solely responsible and liable for the content they distribute.