https://www.theverge.com/2017/12/21/16805674/apple-loot-box-app-store-games-odds-probability-disclosure

Apple is now requiring that any apps on the App Store that offer loot boxes must disclose the odds of the likelihood of players getting different types of items, according to a report from Polygon.

The change comes from Apple’s official developer guidelines, which now state that “Apps offering ‘loot boxes’ or other mechanisms that provide randomized virtual items for purchase must disclose the odds of receiving each type of item to customers prior to purchase.”