There are plenty of instances that are open, but it depends on your definition of “censored” if they are what you seek.

Completely “uncensored” instances are rare if not non-existent because most instances will at least try to adhere to the laws of their jurisdiction and in addition will have some rules in place to keep things running smoothly and pleasant for everyone.

Most big instances are run from the EU so they’ll often have rules regarding hate speech.

Depending on your definition your only options might either be Japanese instances due to less strict laws around certain content or right wing instances, but both will be almost uniformly blocked on other instances.

It means no porn, how much that overlaps with anything remotely considered NSFW is up to the admin and you’d have to ask them.

Pro tip: if you do insist on using Google scroll to the bottom until you see a notice like the one below.

You can then click on the complaint to see the URLs that were removed.

They’ve wisened up a bit and now require a (throwaway) email to access the links, but chances are that if you’re looking for something more obscure, the link you seek is still there.