So it's just for copyright reasons. I was wondering whether there were authenticity issues at stake? For example you can imagine someone wanting a stock image of "New York Skyline" and using an AI generated image that looks right but actually contains elements not in the skyline. This could undermine trust in Getty, which would be something they'd want to avoid.
Lots of art sites are currently being flooded by subpar AI generated garbage. If humans curate AI output and upload only that one-in-a-thousand good looking output, that is fine.
Instead we have bots uploading one image every few minutes, auto-generated from some randomly selected tags. Mostly the tags are wrong and the art should maybe instead be tagged such things as "grotesque" and "body-horror".