Earlier quoted context omitted.
You seem to believe that it is a moral obligation of anyone with an audience/platform to provide that platform to anyone that wants to use it...? Specifically, you described “depriving (someone of an) audience” as the immoral act. Just to recontextualize that: if I have a blog, am I immoral for not allowing comments? Am I immoral for not allowing guest bloggers? Do I have a moral obligation to allow advertisement? Th…
I think a blog is a different enough medium that it renders the comparison meaningless. Hacker News is a website that posts user submissions. I wouldn't make this argument about your blog, but I might make it about Medium.
A failure to maintain that identity would fundamentally change their offering and lose them their audience. You make it sound like a trivial expenditure of Nothing more than a little bandwidth.
And you haven’t meaningfully distinguished it from a blog. Blogs host comments; they host guest posts, and multiple authors. The degree to which they’re one voice or many depends on their individual structure - and none of that contradicts your core moral statement about the immoral act being not letting people have a free-for-all on your private platform. You make a distinction without rationale for why some private platforms are allowed to curate their offerings, and why others are /immoral/ for doing skz