The use of that feature to extract significant amounts of content was noticed over a decade ago by Fravia and his followers:

http://search.lores.eu/books.htm (near bottom of page)

Of course, back then it was the norm to publish this information in a place for those seeking information or otherwise "keep it tight", and not instead let them tighten the nooses around our necks by instantly snitching to the company for the hope of a paltry monetary reward...