Basically this guy bought a first class refundable ticket with zero change fees, and then went to the airport everyday for his free dinner and then rebooked his ticket to the next day. When he was confronted by the airline 300 days later, he simply got a refund for the ticket.
If you want to buy this type of fare, just call the airline, or using the booking class tools on your ITA Matrix search which should also work on Hipmunk.
Okay, I have just hatched a scheme I am going to research. Next time I fly, the idea is buy a refundable first class ticket on a different airline in the same terminal, go through security as a first class passenger, and go to the lounge, and then call up and refund the ticket.