A lot of people misunderstood you. physcab isn&#x27;t talking about gaming on Facebook. He&#x27;s talking about Game of War and Clash of Clans, which are both mobile games. Like another poster has said, games are 75% of the top grossing on the App Store. And absolutely most of Facebook&#x27;s revenue, if not literally all of it, is mobile gaming ads (especially slot machines).<p>I&#x27;m not sure if the gaming industry is driving the growth per se. Based on my experience, it&#x27;s really people buying into smartphones and paying for software (in the form of IAP in games) for the first time in their lives.<p>To be pedantic, people going upmarket in Android is probably their source of growth in revenue. iOS has been pretty rich for a while now and it&#x27;s unlikely that there are users who are spending more or more users who have started spending. But Android had a HUGE amount of space to grow in terms of Android phone owners who actually spent money (based on numbers I&#x27;ve seen in 2015). I would imagine that&#x27;s where the money&#x27;s coming from—the average Android user has gotten a little richer, started spending more on IAP on Android, and therefore game developers bid higher on ads targeting them.<p>It&#x27;s like Upstream Color, except instead of a mind altering slug drug, it&#x27;s Slots Vacation.