However, any person is free to start his own web site and say whatever he wants. You don’t need Twitter and you don’t need Facebook.
Web hosting companies also deplatform.
GoDaddy deplatforms Texas Right to Life’s pro-life whistleblower site.
You can say, well, find a host that doesn't. But you must pay for hosting. And credit card companies also deplatform.
Credit-card firms are becoming reluctant regulators of the web.
You might say, well, find a pro-free speech host that accepts crypto, perhaps on the dark web. And be satisfied with a tiny, niche audience.
Which will satisfy the oligarchs.
And most people won't even do that. They'll quit long before social media, web hosting and credit card companies deplatform them.