In before....
Hey, it is a private business, don’t like it don’t use it.
It is a publicly traded business that purports to provide public access. it is no different than a lunch counter. You may discriminate all you like in the privacy of your home. You may not do so as a publicly traded public access company. That is a violation of the first amendment and is actionable.
Establishing a user agreement that regulates political speech is no escape from the requirements of the first amendment.