Google has introduced a new way for people to earn in-game currency, virtual goods or other benefits in Android games without using actual money, people would need to watch an ad before the benefit is awarded: https://techcrunch.com/2019/03/06/g...-tools-to-make-money-from-users-who-wont-pay/
https://android-developers.googleblog.com/2019/03/supplement-your-earnings-with-rewarded.html
Google today is introducing a new way for Android developers to generate revenue from their mobile applications. And no, it's not subscription-related. Instead, the company is launching a new monetization option for apps called "Rewarded Products." This will allow non-paying app users to contribute to an app's revenue stream by sacrificing their time, but not their money. The first product will be rewarded video, where users can opt to watch a video ad in exchange for in-game currency, virtual goods or other benefits.
https://android-developers.googleblog.com/2019/03/supplement-your-earnings-with-rewarded.html
One trend has been to reward users for a monetizable action, like watching a video, with in-game currency or other benefits. This gives users more choice in how they experience the app or game, and has been an effective way to monetize non-paying users.
To support this monetization method, Google Play is excited to announce rewarded products, a new product type now available in open beta in the Play Console.
Rewarded products make it easy for Google Play developers to increase their monetized user base. Our first rewarded product offering will be in a video format. Users can elect to watch a video advertisement and upon completion be rewarded with virtual goods or in-game currency. In the example below, the user selects "watch ad", views the video, and then is granted 100 coins.