dangillmor, "Adobe’s ‘Ethical’ Firefly AI Was Trained on Midjourney Images" -- https://www.bloomberg.com/news/articles/2024-04-12/adobe-s-ai-firefly-used-ai-generated-images-from-rivals-for-training
(Paywall, sorry...but you get the idea.)
dangillmor, "Adobe’s ‘Ethical’ Firefly AI Was Trained on Midjourney Images" -- https://www.bloomberg.com/news/articles/2024-04-12/adobe-s-ai-firefly-used-ai-generated-images-from-rivals-for-training
(Paywall, sorry...but you get the idea.)