The President of the United States has the same venue for disseminating information as his predecessors: White House press conferences.
As for the five people you mentioned, the CEOs of the "big tech" firms, are not one entity- you've got to go well beyond the pale (as has happened in the past week) to get them all to agree that it is their company's best interest to deplatform you.
As for the five people you mentioned, the CEOs of the "big tech" firms, are not one entity- you've got to go well beyond the pale (as has happened in the past week) to get them all to agree that it is their company's best interest to deplatform you.