I don't disagree with you, Richard. I was just pointing out that ADE is just as proprietary to Adobe as the Kindle format is to Amazon. This often seems to be overlooked. Anybody who wants to sell a reader with ADE has to pay Adobe a hefty licence fee for the right to do so; anybody who wants to sell ADE books has to pay another hefty licence for the "Adobe Content Server" software, plus (I believe) a royalty payment for every book sold.
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