A person's voting power is diluted as they vote more in a day. So If someone votes for your article and nothing else, their vote will be one of full power but if they vote for a hundred other things in the same day, their vote will be watered-down to near worthlessness.

This is what I found about it. It's really annoying tho. I lost close to $150 in the last 7 days, because of this, but we still get paid for using social media. :)