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I've had just few where I voted in the first 30 min and then it got hot afterwards and received about .01, but mostly I've gotten nothing for 99% of votes.

Very good question. I have no clue. I am still fuzzy on exactly how one GETS curation awards. I think I have only ever received curation rewards twice.

Stop wasting your time on them. @ender
Not worth it.; Chasing by its own !
I got both most of the time.