I have sifted through everything from piled up junky independent book shops, to cast offs from research libraries, to dumpsters of end of life books. Most books really are not worth the paper they are printed on.
> Most books of value don't get destroyed or thrown away.
Of value to who? Most used bookstores are boutiques that over-curate and will happily refuse or recycle books that they deem are inferior/irrelevant. This is a big reason why I prefer Half Price Books over most any other used bookstore, they sell most everything.
> Most books really are not worth the paper they are printed on.
Yeah, but like I said in the comment you are replying to, somewhere around 1-5% of books are worth the paper they are printed on and far more, and those are exactly the books the labs are trying to scan and destroy, they are not buying pallets of books and scanning them in order to scan the june 1995 tv guide for the 800th time, they want unique, interesting, and high quality text, because that's what feeds pretraining.
> Most books of value don't get destroyed or thrown away.
Of value to who? Most used bookstores are boutiques that over-curate and will happily refuse or recycle books that they deem are inferior/irrelevant. This is a big reason why I prefer Half Price Books over most any other used bookstore, they sell most everything.