BN used to have a weekly free e-book that would entice quite a few customers to make the drive to the actual store. You had to be on their wifi to download it. I'm not sure if they do this anymore, but this seems like a much better way to beef up sales than to charge to get in the door, particularly when you can walk into your local library for free.
I also think that e-book providers have shot themselves in the foot by not allowing widespread sharing. When I was 19, my bestie loaned me his copy of Stardust, by Neil Gaiman. Since that moment, I have purchased every single novel, children's book, or short story collection that Gaiman has published. I, then loaned a Gaiman book to another friend, who became a fan and purchased many books. The publishers and the author gained hundreds of dollars through these two acts of lending. In this world of e-book restrictions, Nook owners can lend ONE time and I'm not sure about other formats. Rubbish. Total rubbish.