I have always used American Express, rather than VISA/Mastercard, whenever possible when traveling abroad but with AMEX fees now increased to 2.7% from 2.0%, well, now what do I do? Matt Gross, better known to readers of his New York Times articles and blog as “The Frugal Traveler,” offers advice to international travelers seeking to avoid the increasingly costly ATM and credit card fees charged by U.S. banks. (See: Frugal Traveler: Packing the Right Credit Card)