All participants in the Contest must register electronically using the online registration form provided. One entry per person per week will be accepted. Multiple entries from the same person will be voided. Entries void if all information is not complete. All entries must be received by Thursday at 11:59 PM Eastern Time to be eligible for the following day’s drawing. Entries received after this time will be eligible for the following week’s drawing. Each entry is eligible for one week only. Individuals may re-enter each week.
http://www.thegiftcard.com/enter_contest.asp