Think on this: over $250 million dollars is spent at an app store. In one month. Thats nearly 3 billion alone spent on just purchasing an app! The majority of apps don't even generate much of a revenue from for-pay downloads; most income comes from advertising and package upgrades.
The app field of "igaming" has taken its own path to monetization. Like most app developers, igaming app makers rarely charge to actually download their app - and they don't need to. Not only are gaming apps some of the most popular apps out there, they are also some of the easiest to monetize. Most importantly, they make cash hand over fist.
- See more at: http://www.softwaredevelopersindia.com/blog/tutorial-how-to-make-a-gaming-app/#sthash.SF0VxMQq.dpuf