Board Thread:General Discussion/@comment-25074480-20140902011717/@comment-25370154-20140908220738

What about a random challenge drop? Maybe it's a very stupid idea, but read on please:

just like now, there are special challenges which give you rare rewards. But they are available only in a single specific moment and after that they're lost forever.

What I'd suggest is to find Special Challenges in dedicated chests: once you obtain them, you have 24 hours to start them and complete within a defined amount of time.

If you succeed, you get the reward. If you fail, you'll have to find the same challenge once more to retry it.

How would BN gain money from that? They can

 Sell each challenge chest  Sell time-extenders

If you believe the second item is stupid, think about the special weekly challenge "Protect your allies: obtain 300 times the Savior Bonus in 7 days". Now, instead of having 7 days, you only have 3 days to do that. Of course you're gonna need some Stocked Fuel, OR one (or more!) time-extenders. On a side note, I'd gladly accept the DLC idea, at least I could get 1~2 aircrafts I want but I couldn't get for various reasons...