Why do I need to put a hold on an ebook or e-audiobook?
If the item I want is digital, it doesn't make sense that I must wait in a hold list.
Yes, the digital licensing for most of the downloadable ebooks and audiobooks follows the one-user-at-a-time-per-licensed-copy model, following the model of physical items. There's an interesting legal history behind why this is so; the extra technology involved in making sure that each use of a digital item is a permitted use is why there are so many steps involved in getting yourself set up to use these digital items. We're often asked why it's so hard. It's a hard setup because copyright holders require technological rigamarole to protect their property.
Also, did you know we typically pay a lot more for an ebook to circulate to library users than the price you'd see on Amazon for a Kindle copy? Even so, many times our license for an ebook might expire after two years or a certain number of checkouts, and then we have to buy it again if patrons are still wanting the title.