what the **** are you even talking about? EA is a publisher, they heavily regulate speech within their brands. Disney is a publisher and heavily censors speech across its brands. School newspapers have tons of censorship rules. Anything that is not considered a public forum or a state actor can be censored. Milo Yiannopoulos' publisher canceled his book deal because they didn't like his youtube videos. Trump tried to censor Macmillian when they published Fire & Fury but they told him to **** off as is their right. Publishers cannot be censored by the goverment (they can if the feds declare it against national security) but can most definitely censor anything they publish. The market is free to censor its goods and also free to lose lots of money if they take it beyond what the public is willing to accept. You do know we still ban books in the US?
Some dipshit got this "publisher" word stuck in your head even though it means jack shit.
In Hazelwood School District v. Kuhlmeier, the high court ruled that school officials can censor school-sponsored publications if their decision is “reasonably related to a legitimate pedagogical purpose.” This means school officials must show that they have a reasonable educational reason for censoring the material.