When BTS launched *My Universe* on March 19, 2026, it wasn’t just another music drop-it was a retail earthquake. Within 48 hours, Lotte Homeplus’s *official* BTS merch storefront saw 187% sales growth on single-day merch sales, while third-party sellers on Korea’s Naver SmartStore platform faced a 300% spike in “out of stock” errors for *My […]