Same day, same city pair in previous post 5 flights all 50 seaters. Rev HK shows up for the second flight of the day, volunteers to give up his seat in exchange for $400 voucher, contiunes the same scheme for the next 3 flights. Ends up with 4 $400 vouchers, $80 in cash for food, a voucher for a hotel....and than goes out on an AMR flight same night paid for by DL. Suggested to the agent that maybe they should pass around the luck...agent replied that they can do anything they want to.