This can be much cheaper and efficient option for authors to obtain unique identifiers, this service can be upto date with all digital trends, like QR codes for

This can be much cheaper and efficient option for authors to obtain unique identifiers, this service can be upto date with all digital trends, like QR codes for DSBN etc. Also, Only a very small fraction of books have official websites. So, these pages may also serve as official web-pages for those books, kinda like IMDB for books.