One free upvote per day that can only be used on a post that is already downvoted and can't surpass the downvote amount. The post cannot be voted on twice, meaning everyone who voted before the downvote can't revote the post with the free upvote.

Best idea so far. It's the easiest to implement IMHO. It's a neat idea. I'd love to see this on Hive 😃
!PIZZA