what it says in Steemit FAQ
What determines how much of the curation reward goes to the author versus curators?
The rewards are allocated so that 75% of the payout goes to the author of the post/comment, and 25% goes to the curator.
Of the 25% that goes to the curator, that portion will be split between the author and the curator if the curator votes within the first 30 minutes. The split of the 25% between the author and curator during the first 30 minutes is calculated linearly based on the time the vote is cast.
If a post is upvoted the moment of posting, 100% of the curation reward goes to the author.
At 3 minutes, 90% goes to the author and 10% to the curator.
At 15 minutes it's a 50/50 split.
At 27 minutes, 10% goes to the author and 90% to the curator.
If a post is upvoted 30 min after posting, 100% of the curation reward goes to the curator.
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Can I get curation rewards for upvoting comments?
Yes. You can earn curation rewards from upvoting both posts and comments!
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Do I get curation rewards for downvoting posts or comments?
No. Since downvoting reduces the rewards on a post/comment, it does not earn curation rewards.
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What are curation trails?
Some users decide to use third party applications such as Streemian to automatically cast votes. Users can automatically vote for the same posts and comments that other users does. Typically they will set this up to follow the votes of users who are good at curating. When a user has other users automatically voting for the same content that they do, the people that automatically vote after them are called their "curation trail".
so if i want to get more curation rewards i have to vote a post after 30 minutes. is that it?
Yes
thank you so much. that was very helpful