I'm not surprised. I imagine all images on the internet are used to train image classifiers as well. It's a shitty future, but it's the one we have.
My understanding as a two-year student of ML is that you are allowed in the US to go download any old image, train on it, and then release the model as long as the outputs are "sufficiently transformative."
That last phrase is the key part, and has never been tested in court. It's entirely possible that either I'm mistaken here, or that the courts will soon say that I am mistaken here. https://www.youtube.com/watch?v=4FA_gt9w28o&ab_channel=guava...
Copilot seems ... well, less transformative. I'm still not sure how to feel.