One reason I can think of is because of disagreement of rewards. Perhaps you have so much posts that have high rewards and stakeholders wanted to remove some and send it back to the rewards pool for other hivers to recieve, hence the downvotes.
I believe there are many posts out here explaining why downvotes are there for a reason. Cheers😊
Sure but the whales get just as offended if not more when you disagree with their rewards. What is good for thee but not for me hypocrisy will never go away.