Penguin and e-books

I wonder how long it will take for Penguin to discover that if its e-books are not available through public libraries, its sales of books in general will decline?  Library loans are often viewed by publishers as lost sales, but they would be better to regard them as marketing for their products.  Just about all the evidence suggests that people who borrow books, buy more books than those who don't use the library. Penguin's action looks like the act of a company seeking decline, rather than growth!