I searched just quick, and for ex. Getty does not allow to use pictures for ML. Anyway, I think is pretty clear, usually it is not allowed, exept. user upload

I searched just quick, and for ex. Getty does not allow to use pictures for ML. Anyway, I think is pretty clear, usually it is not allowed, exept. user upload a picture to a platform and give all rights away because the platform say it in the EULA.