Starbucks Korea erlebt einen starken Umsatzrückgang durch einen Boykott wegen einer umstrittenen Kampagne am Gwangju-Jahrestag.

Starbucks Korea’s weekly payment volume dropped by more than 8 billion won ($5.3 million) in the week following controversy over its “Tank Day” event, data showed Wednesday.

Payments at Starbucks Korea plunged more than 26 percent in just one week, industry data showed Wednesday, after a controversial promotional event...