@ernie There was a service that tried to do this for a while, you had to write a message in the book and send photo as evidence and it used that to determine one book = one ebook. Naturally publishers hated this idea and the whole thing fell apart fairly quickly 😠
@wiredfire @ernie I have never heard of that "write a message in the book to prove ownership" thing and as a librarian who has also worked at Open Library, I am very curious, Do you remember what it was called?