I have a weird controversial view on this in terms of how to legally do it, and that is, for your 1 model, you should be only required to buy a digital copy of the work, maybe publishers should make digital copies that are tailored for LLMs to churn through, but then price it at a reasonable rate, and make the format basically perfect for LLMs.
This is actually clever, let the market decide the price and the worth of each book for training. Pricing per model might be tricky, instead annual licensing for training might be better pricing structure. Very quickly all big publishers and big labs might find very precisely what the fair price is to pay per book/catalogue.
