@davidrevoy For those (like me) who are out of the loop: https://arstechnica.com/information-technology/2022/11/deviantart-upsets-artists-with-its-new-ai-art-generator-dreamup/.

TL;DR: DeviantArt created an art generator called DreamUp based on Stable Diffusion, and art uploaded by the site’s users will be used for training unless they opt out.