Even if only slightly
Nexus Siege kills should be rewarded monetarily. Even if kills only gave one hundred gold. It's kind of stinky seeing someone you beat in lane able to go downright dunkey on your face just because he has just as much gold as you do.
It kind of discourages early game champions in nexus siege since you can pick a champion that you know can start kicking ass with 4 items and you know you will get to those 4 items.