Libby vs Spotify

Apologies if this has been brought up in the past. I've recently learned about the high cost for audiobooks that libraries loan out on Libby. I do my best to only borrow what I can feasibly listen to in the allotted time. However, sometimes I just can't get into the book or the narrator is intolerable to me and I return the audiobook without listening. I know that unlistened book cost the library money and it makes me feel guilty. That said, I've been wondering if I should start listening to my audiobooks through my Spotify premium account.

Thoughts?