Context: I found out that a Twitter account has been reposting some of my images on their account as well as their website. On its own, I don't have any issues with that, because I view my AI content as just an experiment and don't care if people repost it elsewhere. However, one of those images appears to be behind a paywall on their site, which doesn't sit well with me, as I am putting all my posts up for free and wouldn't want others getting tricked into paying for it.

Is there anything that can be done about such cases? My (admittedly outdated) knowledge is that AI art cannot be protected under copyright.

kekened996 said:
Context: I found out that a Twitter account has been reposting [...]

There isn't much you can do.
Generally if you upload something to the internet = it's for everyone to use and share.
Have already seen my AI art on an other site, too.
If you want something to be yours only = don’t share it.
No matter if you put some license on it or any other "protection". You could put a watermark on it, but I could remove it in less than five minutes and put my own there instead if I wanted to. 😉
The question of copyright on AI art is still debated among law experts and courts are dealing with it right now. But there is nothing definitive decided yet. Also this might be different depending where you live.

silvicultor said:
There isn't much you can do.

I'm considering adding a disclaimer under my posts to inform people that I exclusively upload on here and that no content of mine requires payment to be viewed.

Update: I contacted them via their website's form and the image has now been taken down. In their email response, they claim it was a mistake.

kekened996 said:
I'm considering adding a disclaimer under my posts to inform people that I exclusively upload on here and that no content of mine requires payment to be viewed.

Sure, nothing wrong with that. But the people who get tricked into paying for your gens probably won't be e6ai users anyway, so the effect will be limited.
I mean these scammers might shill on twitter or somewhere else for their shady paywall sites.
I don't think people who know e6ai are very inclined to pay for AI art...

kekened996 said:
Update: I contacted them via their website's form and the image has now been taken down. In their email response, they claim it was a mistake.

Classic scammer response. "All a mistake"... sure what kind of mistake?
“I accidentally believed these images were made by me!”

Tomorrow there might be 10 other sites like this. Don’t bother with this, it’s not worth it.
Also I wouldn't want these people to know my E-Mail, so I would rather avoid writing to them.

silvicultor said:
Also I wouldn't want these people to know my E-Mail, so I would rather avoid writing to them.

I use disposable email addresses for most things online.
But yeah, sad to see these types popping up everywhere, especially within new tech spaces, like AI and crypto.

kekened996 said:
[...] especially within new tech spaces, like AI and crypto.

AI and Crypto have both been excellent examples of new technology that has the potential for a great deal of good, but is instead immediately used for scams, shills, and exploitation. This trend is not exclusive to AI and Crypto, they are simply the easiest to focus on being the newest innovation in recent history.