I agree with Rin, the addition of a currency would/could be a great incentive for people to continue to do the content.

After the first few days motivation to do the content went south fast, its actually a shame because the content is quite fun when you feel you can actually accomplish something.

Maybe they could make it so the content scaled to the users settings similar to leves, obvious the higher the difficultly the higher chance of loot dropping or the better quality the loot would become (and/or more currency being rewarded).