Because:But why would Apple invest any portion of that on a low margin, low growth business like the pro apps industry?
* they want you to buy thousands of dollars worth of Shiney Apple Dongle to get into the ecosystem
* because they want it to be easy for content producers to put their creations from Pro Audio and Pro Video Apps onto the iTunes marketplace (they take a cut of the retail price)
* because they want to make it easy for you to identify and target your market with iAds
* because they want consumers to buy into the marketplace with their iPad to watch, listen, read and play the content you make