Big Tech needs to be regulatated. Twitter especially. Locking the account of the NY Post????
Right, privileges and obligations.
In the US you have a right to free speech and freedom of the press, in that the US Government cannot pass laws infringing on those rights.
No-one has an obligation to provide you an audience or access to their platform so you may spread your ideas and advertise your newspaper for free. If Twitter doesn't like the post they have every right to ban then from the platform. SHOULD THEY? That's another question all together, but there's nothing illegal about it.
This is a thing that escapes many people: just because you have a right, does not necessarily mean I have an obligation.
A guy screaming on the street corner is exercising the right of free speech, but his right starts infringing on nearby homes to live in peace and quiet(they have no obligation to listen to him) and we now have an issue that requires the courts to iron out the order of precedence for the associated rights.
None of this is simple, certainly not as simple as sound bites and comment snippets would make it out to be.