What I could see happening is in the future, there will only be one model, and you can pay to opt out of the ads. That way, they only have to worry about firmware for that model, and not two separate sets of firmware. Plus that way, lower introductory price, and people can opt out when they can afford it (be it immediately, or months later). If the kindle gets sold and linked to a new account, it would default back to having ads, giving them a chance to get paid again to remove the ads on the same device (which ordinarily they would not gain from resales). Plus, most people would probably neglect to pay for the adremoval, and they'd have a steady stream of revenue.
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