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I would not say posts that you like but those who posts have consistently been rewarded with high payouts so you can hopefully get a bigger share. But having said they you will be sharing with a lot of people who also voted.

As far as I understand it Everyone voting/resteeming a successful post gets something, curation etc?

I thought that resteeming does not count towards to curation.

I think you are right. I check out steem stats and on posts I've upvoted and resteemed it's consistently the same amount of SP returned.

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