The success of the freemium model is impossible to deny. Taking a look at the top grossing games in the App Store paints a clear picture. In 2013 all ten of the overall top grossing games were freemium titles. The highest grossing paid game, Minecraft ($6.99) only ranked 18th in overall top grossing games.
If you migrated to iOS gaming from a dedicated gaming device like XBox, Playstation, or even PCs then the freemium game model is most likely not that appealing. Likewise, if you came into iOS gaming as a veteran gamer of the 90s or early aughts, then overall the freemium game system is very likely viewed by you as a travesty.
And yet, this hotly debated new gaming modality is undeniably bringing in the big bucks, at least for certain developers and gaming houses. Enough game developers are making money exploiting the freemium model that the trend continues much to the dismay of what seems like the majority of dedicated gamers.