Deckle me not

Spotted on Amazon on some new hardcover book listing:

This Book Is Bound with "Deckle Edge" Paper. You may have noticed that some of our books are identified as "deckle edge" in the title. Deckle edge is when the pages of a book are made to resemble handmade paper by applying a frayed texture to the edges. Deckle edge is an ornamental feature designed to set certain titles apart from books with machine-cut pages.

...They do that on purpose? And here I thought such books were just cheaply made ...