I know this is a somewhat old post but the poster has a very good track record of predicting what people will vote for and beats most to the punch. The purpose of curation rewards, and I just want to emphasise this:

Steem's Curation System is the First Prediction Market.

Everyone cries about how steem seems to be going down in price, and nobody is trumpeting the fact that this deceleration is very gentle. The combination of the voting system and forum, the dollar peg, and the steem power, have created an unusually stable and nonvolatile crypto-currency. Really, it has stayed very steady against bitcoin, something you cannot say about any other crypto.