I am not sure I see a fundamental distinction between HN censoring your speech on their platform or the government preventing you from speaking in public. Both are censoring you right? Is the difference the fact that HN is free to regulate its own platform as it wants to?
For a large part I see people using digital platforms as a primary method of expressing their thoughts and opinions. Governments in both the US and the EU have imposed restrictions on what platforms may host. I think we have not reconciled yet how to reinterpret free speech online.
Im no expert on free speech, of free speech absolutism, so please let inform me :)
If I have a public platform and refuse to sponsor/publish/platform your speech, that is my free speech right! You don't have the right to force me to speak your words. Only the government is prohibited (by 1st amendment) from censoring/limiting speech (that does not cause or promote violence or injury to others). There are also some restrictions and protections also offered to the press (eg libel and defamation) and common carriers, along with the abomination of the DMCA.
Personally, I don't consider paid speech to be free speech, and I don't consider corporations to by humans, but the supreme court does.
Remember, facts aren't real, there is no truth, and crime is legal (in the current "Justice" Dept).
HN can't put you in jail.
Freedom of association and freedom of speech go hand in hand. You can say whatever you like. You should not be arrested for it. People may choose not to associate with you, or not to do business with you, or not to amplify your speech by hosting it for you.