That's an odd assertion to make when you're talking about Reddit, where anyone can fork a subreddit at any time, or even the web where anyone can launch a website for free or without much expense that can be seen by almost anyone on Earth, or even Donald Trump whose every word and deed still makes headline news and who is currently launching his own multimedia platform.
Speaking of which, Trump and his followers have to be the least censored "censored" political group in history. They're constantly shouting from every social media platform and every comment section about how censored they are. It's ridiculous.
And what has been the impact been of Trump's ban? He's still perfectly capable of getting his message out. His followers are perfectly willing to move to non-mainstream sites like Parler and Gab, and they're still all over the mainstream sites to boot. He's still the overwhelming favorite for the GOP in 2024, and he's starting a social media platform and possibly a streaming TV deal. Trump simply not being President anymore has had a bigger chilling effect than being deplatformed.
As always, the right's hatred of the left has led them to overplay their hand. It's obvious to everyone that neither Trump nor his supporters are oppressed, suppressed or censored in any meaningful way, and certainly not to the degree that they claim.
Well, I'm not a Trump supporter, and have no horses in the left/right race- however, it seems obvious to me that there is censorship involved, given Trump is literally banned from those platforms. Anecdata- the only time I ever saw anything Trump had to say was on Twitter, and since his banning, he might as well not exist in my own infosphere. It's amazing to watch the pretzels people tie themselves in trying to justify their ideology.
I really hope you’re not going to complain “I tried commenting on HN but I got downvoted”
https://old.reddit.com/r/moderatepolitics/ is surely better then the one you mentioned (but it gets a lot less exposure).
I do use Yandex and other websites when what I'm looking for is hidden (but the list of websites that aren't censoring (or are censoring different stuff) is shrinking).