Private companies have the ultimate decision of what speech they allow on their platforms. This has always been true. The right of free speech includes also the

Private companies have the ultimate decision of what speech they allow on their platforms. This has always been true. The right of free speech includes also the right to not speak - no private platform can be compelled to publish speech that they don't want to publish; doing so would be a violation of their first amendment right to dictate how they speak and don't speak.