> They offer no conclusion on how sellers can materialize thousands of copies of a book out of thin air. Claimed, but unverified stock? Print-on-demand counter

> They offer no conclusion on how sellers can materialize thousands of copies of a book out of thin air. Claimed, but unverified stock? Print-on-demand counterfeiting. Though they don't need to materialise books out of thin air. They can buy up used books and mark them as new, for instance.