Mobile games these days are largely dominated by free-to-play offerings that pressure users to spend money. Often it's about spending money just to be able to continue playing the game rather than the more traditional paying for optional upgrades or bonus content. This has resulted in a reliance on "whales" - the incredibly small percentage of users that account for the majority of the revenue - and creating a game that will hook them. They'd rather do that than make the game fun and invitin...