It's like what is one person's garbage could be another person's treasure that might be priceless and therefore impossible to be over rewarded, if it is priceless. Beauty is in the eye of the beholder.
I think you answered your own question(s) here - each person can use their up or down votes to show how they feel about a post. The consensus of which is rewarded at payout.
I didn’t remove all rewards, I chose to use my stake to decrease this post by the amount that my vote is worth. Others can choose to reward it for what their vote is worth if they think its worth more. This is exactly the way the system is designed.
RE: Lasse's Angels promotion campaign: Are you an attractive female that would like to make 5000 LASSECASH per post ones a week for 3 months? (Guaranteed, potentially much more if the price of LASSECASH goes up)