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The money you earn for your post is not all yours, 75% is yours and the other 25% gets split between curators based on how much Steem power they hold. This is how new coins are generated. The staking of the coins or Steem power creates the security of the blockchain and also mines the new coins in the algorithm

Gotcha, thanks! Ok sorry just ooone more question... so if you choose to use full Steem power rewards on a post instead of a 50/50 split, then do curators still get that 25%?