Forget about that, though. This isn't about any specific website. Indulge me with a hypothetical.
Imagine for a moment a future in which a web browser exists on par with something like a Gopher or Usenet client: a historical curiosity, used only by a tiny fraction of weird people, a few thousand worldwide, tops. The majority of content is posted and consumed via native apps, communicating with centralized services from cryptographically secured devices that do not allow any sort of inspection, debugging, tampering, ad blocking, memory dumping, hot patching, or other runtime-modification fuckery. It's an end-to-end chain, determined entirely by a small group of people at TSMC, Apple, Comcast/Cox/et c, Facebook, and Google.
The apps all still use HTTP (with TLS) to talk to their APIs, of course. But you can't go to webpages, even ones you don't like, because there aren't any. You can't start a new website, because nobody uses browsers any longer.
This is the trajectory we're on. It has nothing to do with whether you like whether or not specific sites like Gab or 8chan exist or not, or where you fall on the freezepeach spectrum of opinion.
Now, out of the hypothetical. Let's talk today. These censored platforms are engaging in an all-out assault on the web. Instagram has banned hyperlinks. Browsers on mobile cannot be extended via plugins or extensions. Gmail is censoring inbound emails not sent from a small whitelist of providers. Google Chrome is about to defang effective adblocking via a plugin API change. Apple, in their iOS, has hidden the Taiwanese flag in mainland China, and has replaced the gun emoji with a picture of a squirt gun worldwide. There's no hack or workaround for this. Entire swaths of potential businesses have been prevented as a result of this type of overarching design: bake censorship into everything.
If the world continues on the path it's on, soon the web will be gone and mass publishing will be centrally controlled, as mass publishing has been for almost the entirety of the history of mass publishing. The free and open web where virtually anyone can start building an audience was an anomaly, a first of its kind in history, and several extremely large and well-funded organizations, Facebook and Apple primarily among them, are working to bring an end to this historical deviation.
I really, really don't want that to happen. And it has positively nothing at all to do with the sites you listed.