If something is frequent, they'll have to do it. If it's fun, they'll want to do it. Mobile gaming hardware will be the primary gaming platform in 2016 according to a Juniper report. 60% of game purchases are made on mobile devices, with 25% spent on additional game content and 15% spent on in-game currency. Free-to-play games with asynchronous multiplayer and stagnating progression encourage purchasing in-game currency.