"Amazon should try giving away paperwhites for free." It would make sense in a lot of cases. Personally, I buy many times more books than I did before I got a

"Amazon should try giving away paperwhites for free." It would make sense in a lot of cases. Personally, I buy many times more books than I did before I got a Kindle but, I guess, they have calculated that this won't be the case for the majority? The problem is that it's hard for them to compel people to keep buying content - unlike the way mobile operators give phones away in exchange for a binding, fixed term contract?