Publishers love variable fee rates. Consumers prefer flat fee rates. Such is life. I don't understand why they are not looking at the renting as advertisement. It would be interesting to see if sales go up as a result of the borrowing. The other problem is that there really is not very many books available (5,000 sounds like a lot, but if you can't find anything...). The last problem is that it is at most one book a month. I can read a substantial book in 3 days.