https://cdnph.upi.com/ph/st/th/5081776818866/2026/upi_com/9980ce50024911c26ad58f5380936bd4/v1.5/CU-franchisees-hit-by-prolonged-delivery-strike.jpg" /> Franchise owners at South Korea's CU convenience store chain are facing mounting losses as a strike by unionized delivery drivers drags on.