The Mastodon instance at which I’m a donating subscriber has a 12,000 char limit. And they block CF AI datafarmer bots. It seems quite trivial to block NSFW there, and it hasn’t got any designated special-interest allegiances:

from https://hear-me.social/about
hear-me.social "is a general-purpose Mastodon server administrated in the Greater Boston, Massachusetts area. All are welcome to sign up, so long as the rules are followed.

"We federate with Threads, some do not. Read our Threads FAQ.

"We use Cloudflare to block artificial intelligence (AI) bots, crawlers, and scrapers from scraping your content for training large language models (LLM) to recreate posts without your permission.

"While most Mastodon servers are limited to 500 character posts, here posts can be up to 12,000 characters because we think you have important things to write.

"We also relay with over 1,500 other servers, some very large. This means we share each other’s posts and accounts in real time. Your posts go to those servers immediately, even if there are no follow relationships. Servers without relay relationships only share posts when there are follow relationships. Your audience is large here, and you see more posts than you would on servers that do not relay.

"You can see the incoming messages arriving here from all over the Fediverse from the relay by going to our Live feed

"We do not secretly shadow-ban our own users (“limit” or “silence”). We will always notify the account owner of the action and the reason.

“When signing up, you must read the quick, short, set of rules presented to you. Requesting an account is confirmation that you have read and agree to abide by our rules…”

Their attitude is so great that I’m proud to donate, rhyme unintended, and I’m not usually too much of a donor guy. I just do a monthly coffee. They do not beg in any way. As far as I know it’s just one guy, spending a lot of his own time & money on the Mastodon server as well as the PieFed instance from which I’m posting, and a Pixelfed instance, and a BlueSky PDS.

toots.matapacos.dog has a 2,000 character limit.

Among the Mastodon universe, I’ve noticed few distinct types of instances.

• There are the “flagship” general-interest instances. It is the goal of these instance operators to keep political strife to a minimum (within reason) to make the instance as welcoming as possible to as many users as possible. These tend to be fairly good about removing outright Nazis and hate speech, but politics is often treated as a potentially triggering subject (fair enough). In short, they are run by Liberals. They will embrace calls for solidarity, inclusion, and emancipation insofar as it doesn’t undermine the established Liberal institutions. Anything going further seems to stand on shaky ground.
• There are the special interest instances. Instances focused on subjects from comics to electronics to cooking to LGBTQIA+ and issues of intersectional oppression. I assume many of the operators and members of these instances would like to, more or less, remain out of the fray and focus on these interests. There is a reason their members chose these spaces instead of more mainstream or more explicitly political ones. While many of them may be operated or used by comrades, they don’t seem like the correct place to go and talk about Communism 24/7 unless you have a credible reputation in that community.
• Finally, there are the anti-capitalist instances. These instances are primarily focused on politics, and they are on the correct side of the defining struggle of our epoch - however - among them there is a disappointing amount of sectarianism. I will always assume the best of my comrades, but none of these places (at least the ones with open registration) seem like a good fit for me or many of my comrades from Hexbear.

So my goal here is to establish an anti-sectarian instance along the lines of Hexbear where Anarchists and Marxists are welcome. A space where the focus remains eternally on our leviathan enemy, bourgeois class society, the greatest existential threat to humanity and the planet. A place where a full spectrum of anti-capitalist tactics and theoretical perspectives can be entertained in good faith.

Blahaj.zone runs on AWS not Cloudflare.

Blahaj.zone is a smaller instance with less than 3000 users.

There is no character limit that I see.

At least on lemmy.blahaj.zone Ada has blocked nsfw instances, I assume she did the same on blahaj.zone. EDIT: I just double checked and for sure a lot of NSFW instances are blocked by blahaj.zone.

Finally, as the instance for transfolk, it has never at any point federated with Threads