Lots of things I'd assume. Without doing any research, here's a twist (still likely not legally wise):
The startup scans your books.You pay a monthly fee for storage of your books at their facility, which is a free-to-use library. You remain the owner of the book and take the scans with you.
There are probably some (many) issues here, such as first sale rights, but it's not crazy.Adding additional businesses could help (coffee-library-book scanning) offset the expense but it's probably easier to try and change the law - someone would be angry enough to make your life miserable.
The startup scans your books.You pay a monthly fee for storage of your books at their facility, which is a free-to-use library. You remain the owner of the book and take the scans with you.
There are probably some (many) issues here, such as first sale rights, but it's not crazy.Adding additional businesses could help (coffee-library-book scanning) offset the expense but it's probably easier to try and change the law - someone would be angry enough to make your life miserable.