http://www.pcgamer.com/apple-now-requires-app-store-games-to-disclose-loot-box-odds/

Apple rolled out an update to its App Store Review Guidelines yesterday with a new rule requiring apps with loot boxes to disclose the odds of item drops. "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," the new rule (under section 3.1.1) states. 

Loot boxes are probably the biggest videogame controversy of the year, an outrage largely sparked by their use in Star Wars Battlefront 2 that has spilled over into more widespread concern about randomized item drops. The problem isn't so much the randomization itself (it kept me playing through more hours of Diablo than I care to admit) than it is the relatively recent trend of charging players for the privilege of rolling the dice: Instead of buying whatever it is you need to get on with your in-game life, you buy a box and hope it's inside. And then another. And another. And another. And another.