i think that most of it is non-essential as well; but you may want that live version of "my humps" for some reason. but i've heard of other retailers (hmv, virgin, tower) removing some of these artists off of their shelves entirely because of these exclusive deals. it not only hurts the artist (who sometimes get robbed from the soundscan numbers due to these deals), but also the fans who want to purchase their other albums; not to mention the retailers themselves with their "i'm taking my ball and going home," attitude.
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