Success story from the Win8 app store: earning $30,000 a month

Microsoft launched the Windows Store on October 26, and many developers believe that there are not enough people using Windows 8, so they are not very keen on developing Win8 applications. But the following story tells us that the development of Win8 applications seems to be quite promising.
According to foreign media Neowin, a developer named Kevin Ashley talked about his story. He developed the Win8 app and can earn $30,000 a month. The app developed by Kevin Ashley is called "Card Games Chest"; although this is a free app, he can get a lot of revenue from advertising.
Kevin said that Microsoft's Win8 app store offers more opportunities. He has also participated in iOS developer gatherings before, and he asked a question: “As a new developer, how much profit does the Apple Store use in card games? ” Then was ruthlessly hit "This game is saturated in the Apple Store". But Microsoft's Win8 app store situation is very different, and it is now expanding.
Does anyone read his story and start to dig a bucket of gold in the Windows Store?