are upvotes on posts more than 30 minutes old worthless to both author and curator?
Regarding the author - Not at all worthless. Every upvote adds to the payout for the author.
For the curator - Depending on how many people voted before you and how many people vote after you, you could receive a small or a large curation reward.
Aah! Brilliant, thanks for clarifying.
And again, great post.
You're welcome. And thank you.