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Adobe Stock Contributor Agreement isn't at all clear about the use of contributor photos for this kind of thing. I expect backlash from stock photographers about the use of their images to train Adobe's AI model here, justified or not.
I see two sections where the right to modify, transform, and create derivative works are explicitly called out so I think Adobe is quite fine in using stock photos within a training set per this agreement. They don't say "train AI models" specifically but that would be unnecessary given they claim rights to "developing new features and services" along side the more general "derivative works" license. We have not yet seen any indication that the use of copyrighted materials within a training set grants any license rights to those created or derivative works yet.
Whether contributors will be fine with this development and will want a future license to have options or be explicit about AI training is another story, but from a legal standpoint, I don't see much here to complain about since the original agreement is pretty permissive for what Adobe can do.
