Burn's mystery boxes
Now that I've got all the buildings that can I buy with donuts from the yearbook box, I only seem to get rubbish from the burns mystery boxes. So I'm guessing that once you have them, there is nothing...
Forum Discussion
The Burns box has a pattern to it. After you get the unique items out, the pattern settles down to make it the best way to increase your bonus in the regular game. The news vans and the billboards increase bonus consistently
