As many suspected:

“Midjourney Founder Admits to Using a ‘Hundred Million’ Images Without Consent”

https://petapixel.com/2022/12/21/midjourny-founder-admits-to-using-a-hundred-million-images-without-consent/

Midjourney Founder Admits to Using a 'Hundred Million' Images Without Consent

It has outraged artists and photographers.

PetaPixel
@Riedl isn’t that the same as reading all books of the world in order to become able to write? Would we call that copyright infringement, too? Or is the AI actually using parts of the art it trained on its creations?

@danvanmoll
That is a plausible argument that sort of aligns with how the models work (though anthropomorphizes as well). I think that most generated art will not rise the the level of copyright infringement. At the same time artists are justified in their anger when their art is used without permission.

IMO we need to separate the implications of input/training and implications of output/generation.