Developers can make sizable profits from in-game purchases and currency by luring players with virtual goods & providing incentives to spend real money. In order to encourage pfree penny slotslayers to make more purchases, developers can also use tactics like exclusive items, time-limited promotions, and in-game sales. A freemium business model, in which users can download & use the game app for free, but can also choose to pay in-app to improve their experience, is another way to optimize revenue from in-game currency and transactions.