Yes they can!
When you click on the retailer of your choice, you’ll see a Share button. When you click on the Share button, you’ll be given a link to the retailer’s website which you can email to family or friends. As long as they click on this link to make their purchase, the cashback will be tracked to your account.
The cashback from any purchases made by friends or family will go directly into your wallet, so be sure to buy them a little treat!