Also, on the topic of removing the cap message, here's my counter-argument to people not knowing whether they are capped or not:
The first message you get should be enough to let you know if you're capped or not. When you are told "Close to nothing has happened" from killing demonlogists, the dragon, ice queen, etc. that should mean something. When you get "You feel proud of what you have accomplished" from killing trash-mobs, then that also should give you a "!" signal that you're probably neglecting.
Remove the cap message, let people use their 'gain' as judgment.