Think smaller SP holders need to be able to add value by curation comments of other smaller SP Holders possibly. Why not show rewards in STEEM instead of $? Then $0.22 would be 2.528 STEEM and 0.001 STEEM curation reward from a smaller user would be possible by a 100X smaller SP holder. Then that smaller holder would see their reward worth 0.001+ STEEM as opposed to $0.00 and feel like they are actually adding value that they could see.