Sort:  

If you simply upvote everything your voting power will go down to near zero.
The rewards intend to reward the work of selecting what is good.

hey and hi
simply curation is you proving your value to the steemit world.
firstly there are a lot of bots around and payouts occur at 50% to the author and 50% to the earliest curators over two time periods; the first 12 hours and the first 30 days.
your mission should you choose to accept it is to review new content; votes are degraded in less than the first 10 minutes and within 30 mins votes have the most effect...
the earliest decent votes gains the most curation reward dollars. however you only get 20 votes per 24 hours, so if you vote 25 times your votes degrade your rewards.
the trick is to find 20 topics within 10 minutes and 30 minutes that will likely become hot, trendy or go viral.
the stronger your voting history the stronger your SP and other rewards...
do a good solid job and you build up a stronger reward profile for yourself do a lackluster job and your perceived rewards become lackluster.
good luck and good timing out there...