R&R sounds very diplomatic and takes the edge off the term "downvote" I could get behind that. Redistribute would need to have a hover explainer telling grandma By pressing this button you will influence X rewards to be removed from this content and sent back to the pool for redistribution.

Using the word content because it is agnostic to comment or post type.

An emoji layer as well would be good as mentioned already in this thread. I could put the crying with laughter face but not necessarily choose to remove rewards.