Noticed this today! I kind of like where they're going with this, also love the $.50 games (picked up dead space!) and the $.25 Anthony Bordain book I bought today, they're just giving this stuff away! haha.
I think those cheap prices are a limited time. Other than that yea they are doing a $0.25 app per day trying to do the same thing the Amazon AppStore does but with a small price.