Fair enough. It sounded like you were using “I’m not happy with this book” to return it for a credit and get a different book repeatedly.
I haven’t heard any podcast ads so I’m not sure if people are doing their own bad reads. The actual cancel page made it pretty clear to me that unused credits disappeared every time I turned it on and off.
I’ve never seen a book for more than one credit, so not sure if you’re in a country with a different setup or what.