Fuzex team is yet to disclose this information due to legal NDA issues and they may even plan to get a banking license in Korea for their card.This is what I got to know from their team discussion on the telegram.
sure the issuer is of great importance but the other equally important dimension is the geographical area covered by that card.
Worldwide, this is the information I have and one reason I would like to buy FXT tokens when it hits the exchange.I couldn't participate in the presale with 5ETH but would surely be grabbing some when available in the market.