Steemit reward curation does not function how you would intuitively think that they do. If it was this simple, bots would be effective. The creators of this wonderful platform are much smarter than that. The website, steem.io has an excellent page explaining how these rewards work : https://steem.io/getinvolved/paid-to-curate/
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You mean that you think they would reward you, but they don't? :)
Nope, that's not what I mean. You would think that the more likes you give out the better your curation rewards, but in reality the best curation rewards come from giving out 20 careful likes per day.