So there's a new law passed in China that forces game developers to reveal the probabilities / odds of random-draws and dropped loot in MMO games:
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
So Blizzard has released this info in China regarding how often certain items are given from their current loot box system:
- Every box contains at least one rare (blue) item.
- Players get an epic (purple) item once every 5.5 boxes.
- Legendary items appear once every 13.5 boxes.
https://www.kotaku.com.au/2017/05/blizzard-reveals-overwatch…
Still waiting till Overwatch goes on sale for less than $60bucks then I'll try it