If you have an Audible subscription, you may have noticed the same behaviour there. Large numbers of books labelled as 'free with your membership', which likel

If you have an Audible subscription, you may have noticed the same behaviour there. Large numbers of books labelled as 'free with your membership', which likely only cost Amazon the price of delivering the files. Which makes sense, because once I have paid for my credit the worst outcome financially is that I use it.