The big media corporations make choices to maximize profit, violating their ToS is not protected by the 1st amendment, neither is their inconsistent application of the ToS. Argument can be had about the liberties the big corporations can have about controlling the speech on their platforms, but none of this is violating the 1st amendment.
As for the absolute free speech. You think Trump should be allowed to say that Nancy Pelosi should be immediately executed for opposing his presidency? Or perhaps some big media figure lying about a smaller figure to get them ruined in the eyes of the public? Or maybe lying in a court testimony to get someone innocent prosecuted?
Free speech absolutism is objectively wrong.