Again, I encourage you to read the ruling. It addresses this claim quite thoroughly:

> Traditionally, the First Amendment imposes limitations only on “state action, not action by private parties.” Lloyd Corp., Ltd. v. Tanner, 407 U.S. 551, 567 (1972).

> However, plaintiffs “may establish a First Amendment claim based on private conduct if that conduct ‘can fairly be seen as state action.'” Id. (quoting Rendell-Baker v. Kohn, 457 U.S. 830, 838 (1982)).

> the Court instructed that “[i]t is axiomatic that a state may not induce, encourage or promote private persons to accomplish what it is constitutionally forbidden to accomplish.” Id. (quoting Lee v. Macon Cnty. Bd. of Ed., 267 F.Supp. 458, 475-476 (M.D. Ala.), affd sub nom. Wallace v. U S, 389 U.S. 215 (1967)).

Essentially: yes, you do not have a right to post on Twitter, you cannot sue Twitter for violating your First Amendment rights. But the courts have repeatedly affirmed that this does not create a loophole for the government to launder unconstitutional acts through private parties.