Honestly, i would consider what i mentioned about exp an example, as the title says i havent written specifically exp bonuses, even a shop, made to be used by points gained for activity (perhaps the current system, perhaps a new, daily one), which has exclusive items will do just fine in my opinion. Reason i made this suggestion was that it seemed rather unfaie that a person who plays for 3 hours and makes the required kills, is equivilant to someone who plays, for example 10 hours and gets 500 kills.