It's a new service thing on Hive blog that popped up recently, where authors can choose @commentrewarder as benefactor on their posts for a % of the payout.
Then authors can choose to upvote people who comment on their posts and all the people the author upvotes in their comments, get shared the rewards of the post by the % the author chose for benefactoring @commentrewarder
This is their introduction post: https://peakd.com/hive/@commentrewarder/introducing-commentrewarder-a-new-service-to-reward-comments
I think it's a really cool idea to get people to engage more under posts on Hive posts.
Got it. Acid did mention about it to me.
Hah I saw this too and had to look into it...