After the new hardfork, everyone got a free downvote mana. That is why I started to follow @spt-skillup downvote trail. You got that downvote presumably because you have used upvote bots for your article and that is considered as a bad action by downvoters. So if you want to not get these donwvotes, stop using upvote bots. You got your tokens back and the post is un-voted by me. Have a great day.