SEOUL -- As the operator of a burger shop in southern Seoul, Hwang Seong-koo had a growing feeling that he was not feeding customers so much as sating the appetite of online delivery services like Coupang Eats and Baedal Minjok, known as Baemin.
These companies, which accounted for almost a third of his sales, were holding onto as much as 30% of his customers' order payments to cover brokerage, transaction and delivery fees.
