Hello @ all, this is my first Post from a bug, and sorry for my bad englisch, im from germany ^^ I found a bug, about the bountys.
1. Start a new Adventuremode Game.
2. Make ALL Bounty´s, without speaking with Tyrael (I mean act 1-5 without finnish the quest!!!)
3. If you finisht this all, finnish the Bonus bounty !!first!! and get your cubes
4. Look where the next Bonus bounty is and repeat 3 - 4 at all other Bounty´s
So you can get from ALL bountys 2cubes, and you must only make one bounty with 5quests, i hope you will unterstand what i mean ^^