The massive Steam holiday sale was also a big win for Valve and its partners. The following holiday sales data was released, showing the sales breakdown organized by price reduction: (via http://www.codinghorror.com/blog/archives/001293.html) Basically what they proved is that when a game is priced in a reasonable price they sell more. This way sells go up, privacy goes down and everyone are happy (besides the lawyers which have no one to sue for copyrights infringement).
10% sale = 35% increase in sales (real dollars, not units shipped)
25% sale = 245% increase in sales
50% sale = 320% increase in sales
75% sale = 1470% increase in sales
Another Example Of How Wrong The Game And Music Industries
Same thing can be learnt from the AppStore where $9.99 considered as an outrageous high price, but the app developers still make decent I come with those prices due to high volume of sales.