The walmart survey at www.survey.walmart.com has it’s own set of rules that is specific to the survey, it states who can enter the survey and when the survey is available. It also provides all the information you need about the prizes and how to enter. Some more informative information it also provided such as the odd of winning, prize restrictions and how the winner will be notified. You can also have some basic liability and use of data information. For more information go: www.survey.walmart.com rules
If you want to know who has won the sweepstakes then you can visit the www.survey.walmart.com winner list.
This list is nothing fancy, just a basic list detailing when the sweepstakes was run and the winners for that period.