To be eligible for each day's sweepstakes you have to enter each day. For instance, if you entered earlier this week and didn't win, you still need to fill out the form again to be eligible for today's drawing. You must be at least 18 years of age to enter and a legal resident of the United States. If we could make it open to the entire world, we would. Because ZDNet must obey the law.
Most jurisdictions have strict rules about conducting contests to protect citizens.
Unfortunately, the patchwork of different laws makes it impossible to comply with the individual requirements imposed by hundreds of jurisdictions. No purchase necessary to enter. Void where prohibited or restricted by law.