China has recently passed a new regulation which will force game developers to showcase the probabilities of loot boxes.
The rules specific to loot boxes :
2.6 …Online game publishers shall promptly publicly announce information about the name, property, content, quantity, and draw/forge probability of all virtual items and services that can be drawn/forge on the official website or a dedicated draw probability webpage of the game. The information on draw probability shall be true and effective.
2.7 Online game publishers shall publicly announce the random draw results by customers on notable places of official website or in game, and keep record for government inquiry. The record must be kept for more than 90 days. When publishing the random draw results, some measures should be taken place to protect user privacy.
The regulations would come into effect on May 1, 2017. This will be a fair way to ensure that people do not undergo loss of lots of money for a knife, or an elusive courier.
Source : neogaf
