Simple answer:
Upvote = Reward.
Downvote = Reduce Reward.
Instead of a thumbs up, it's a thumbs down. As you can see on your pending payout on this post, it has already been reduced by ~$15 or so, and I wouldn't be too surprised if it went down to less than $5.
Ok, Understood, will be more attentive about everything now!
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
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