It looks like DeviantArt sent out an update to placate its community [1] with some interesting technical implications:
1) DA tos stipulates that works of art needs to be opt-in for inclusion into AI datasets 2) scraping/downloading art will include a response header with "X-Robots-Tag: noimageai" to indicate individuals building models should not use the downloaded image in a dataset.
As someone overall empathetic to the artist community (who have had to deal with NFTs, copycats, difficult industry), I have no illusions that this will have a hard time standing up against fair-use laws. That being said, if you're looking to build an ai-art model, this might be worth paying attention to regardless if you decide to comply or not.
[1] https://www.deviantart.com/team/journal/Tell-AI-Datasets-If-...