Seems like the "Profit Paradox" at work ... something that Microsoft is expert at.
(In short, the "Profit Paradox" could be defined as how a company "kills itself" in it's efforts to "miximize immediate profits." Sometimes, the marginal "Lifetime Rate of Return" of the "next penny" added to this quarter's bottom line is significantly less than that "same penny" remaining in the consumer's pocket ... and having that consumer maintain a positive image of one's company is his or her mind. For example, if I were to say choose one of the following to describe Microsoft, which answer do you think most people would respond with - per Star Wars (A) the Good Side of the Force or (B) the Evil Empire?)
Microsoft could just as easily have set it's conversion rate for it's marketplace at 100 points per 1 dollar instead of the asinine 80 points per 1 dollar. But no, it was all "calculated / desinged" to maximize their "bottom line" at the "consumer's expense."
Genius? Sure ... if your an MBA and only concerned with this quarter's profits. Stupid? Absolutely ... if your interested in building something that is going to last :)
Zune Marketplace's Absurd Pricing Scheme