Starbucks dethroned in card spending after 'Tank Day' campaign

Rival coffee chains are chipping away at Starbucks Korea's market lead in the fallout from its "Tank Day" controversy, payment data showed Tuesday, with Twosome Place having overtaken Starbucks in monthly card sales for a third straight month. Twosome Place logged an estimated 117 billion won ($82 million) in card sales last month, some 7 billion won more than Starbucks' 110 billion won, according to IGAWorks' Mobile Index. Twosome Place has outsold Starbucks every month since May, taking the le