If the story aisles don’t seem as busy as the parking lot, here’s a potential explanation: A new survey finds half of Americans are using click-and-collect shopping options. The good news for retailers is that when shoppers select purchases online and pick them up in-store, nearly 70 percent of those using the option say they often buy more from the retailer.

The International Council of Shopping Centers survey finds the top reason for using click-and-collect is avoiding delivery fees (49%). Others include getting the merchandise faster (40%); and the assurance that an item is available once they’re in the store (33%).