I'm new to this but still I cannot make both ends meet with this kind of technology.

For example; Picking one article up (https://steemit.com/piston/@xeroc/piston-web-first-open-source-steem-gui---searching-for-alpha-testers) may I know what are this "Pending Payout $ 21,362.86" mentioned below the article imply?



Also how is this technology supposed to liquidate its assets in future?