http://dwnl3pr7ombq2abcycysnlqcl7rd6lqbavnir2swapbfyzrz4e7ae4id.onion/blog/what_model_to_use.md
What isn't clear is the legality of this practice. Users hold the power of their wallet, and the question is if people really care if models are trained on copyrighted materials. Personally, I don't, and I don't think courts will consider it illegal.