A cold splash of water on Mac App Store sales

Sam Soffes released his new product, Redacted for Mac. He never expected his product to quickly become the #8 top paid app in the US and #1 top paid app in Graphics. Break out the champagne, right?

Follow the link, read the blog post. The Mac App Store has become a bit of a ghost town. Is this purely a lack of compelling apps? Is this a sign that more and more apps are pulling up stakes and selling outside the Mac App Store? Do Mac users have all they need right out of the box?