This seems like the key point. The teacher who buys a text book to share it’s contents with others is the intended use of the content. There’s clearly no theft there. If the creators of all this content had genuinely intended it to be used this way then there would be no problem. But the vast majority of artists/authors/creators seem to be against the use of their work like this (perhaps given appropriate compensation they could have been brought on side?)

35 billion of 213 total. Wouldn’t call that most. I would guess it’s more important in it’s share of profit (but maybe not even right now with the capex explosion) or of profit/revenue growth.