Caught in the FTX storm: how a crypto high-flyer fell to Earth

Mastercard has cuts its ties with the Maps payments app run by British-educated cryptocurrency tycoon Alex Grebnev, who was backed by Sam Bankman-Fried, amid a row over Russian usersAs western brands began the stampede out of Russia a year ago, its citizens found themselves unable to pay for the international goods and services with which they had become so familiar.Among the first firms to sever ties were the credit card companies Visa and Mastercard, leaving Russians struggling to spend their