I agree the reward is low. It has an interesting history behind, but somethings are really annoying. For example when we try to go do the Cassiopeia Hollow leves at level 30, we find many troubles there, for example just at the entrance there are already lv. 36 monsters, that you will have to run to save your life. And them, when you're doing the leve that you have to protect the NPC, sometimes this NPC is near those high level monters and make very hard to complete the task.