Sort:  

STEEM is currently worth around $6-$7, so with your author rewards of $3.56 you got $3.56 worth of Steem Power. You should use 50/50 type of posts when 1SBD is traded significantly above 1USD because for powerup posts the blockchain will always assume that 1SBD is worth 1USD, so in such case (when 1SBD>1USD on markets) getting payout partially in SBD would allow you to sell SBD for STEEM at better rate than 1:1 and then you can power up all that STEEM.

Thank you very much.