It has to be the price of steem, I made a post 6 days ago, the potential payout was $21 dollars, now its down to $15. the price in the market of steem when it first posted it was around 2.10 today the price is at 1.70. I also noticed voting power taking very long to come back to 100%, it took me like 3 days to come back from 50% voting power.