http://www.mycokerewards.com/instant-wins/a-500-southwestgiftcard-is-in-reach/26481
Click section 5c in the rules for free entry
61 Grand Prizes: A $500 southwestgiftcard®, terms and conditions apply. A southwestgiftcard is only redeemable at southwest.com, 1-800-I-FLY-SWA, or any Southwest Airlines ticket counter for air travel only. A southwestgiftcard is not valid for the purchase of Vacation Packages, Cargo, Hotels, Rental Cars, Cruises, Group Tickets, codeshare flights (on codeshare partner’s web sites), additional southwestgiftcards, EarlyBird Check-In, or inflight purchases. Only four total forms of payment, including southwestgiftcards, may be combined per purchase. A gift card is nonrefundable and not redeemable for cash or credit except where required by federal or applicable state law. A gift card is not replaceable if lost, stolen, or destroyed. Protect the card like cash. A southwestgiftcard never expires and has no fees. For balance check, call 1-866-393-2081. For any additional questions, call 214-932-0333. Activation or use of a southwestgiftcard constitutes acceptance of all terms and conditions listed at southwest.com. Retail Value (“ARV”) of each Grand Prize: $500. Limit: 1 prize per person. Total ARV of all prizes: $30,500.