Good approach on SBD when re0use some of the older material. But to be honest, I think when you upgrade your old material, you are allowed to repost it without declined payout. When people do not want to vote on it, that is their choice. I personally would vote for a re-post of upgraded materials when I like the upgraded material, when the upgrade itself is enhancing the (new) outcome. I would not give such vote when I curate using high value vote power which is meant for those who have good posts but low attention (as I'm doing for music). I must say, when somebody re-circles (with upgrades) all the time their material, then I would stop looking at that material, maybe even the author.