Option 2 looks good:

"How will the amount of my refund be determined?(top)
If you are eligible for a refund, the amount of the refund will depend on a number of variables. The first variable is the Refund Option that you choose to file. Refund Option 1 will provide an easy refund of $25. Refund Option 2 will be based on typical spending patterns during travel outside of the U.S. Claimants who choose Refund Option 2 will provide an estimate of the number of days they spent outside of the U.S. during the class period and the frequency of their travels for the purpose of business, visiting friends or relatives, vacation/leisure, or other travel purpose. Travel purpose and time outside the U.S. are factors captured in the U.S. Department of Commerce annual Survey of International Air Travelers, and can be used as predictors of trip expenditures outside of the U.S. The Settlement Administrator will calculate the amount of the refund under Refund Option 2 using an algorithm. The algorithm is designed to provide an estimate of a Claimant’s refund using the information supplied in the Claimant’s Refund Option 2 claim form and other data, including from the U.S. Department of Commerce’s survey noted above. The algorithm calculation for a Refund Option 2 claim will be based on a 1% foreign transaction fee. Refund Option 3 will utilize the bank that issued your credit and/or debit/ATM card and the dollar amount of your foreign transaction fees (apart from any alleged increase in base exchange rates). Refunds for all claims, regardless of the option chosen, will depend on the amount of money available to pay claims and the number and total dollar value of all valid claims filed. You might get only a partial refund, or, in some circumstances, your claim might be adjusted upwards. Any reductions made to refund amounts are designed to ensure that every claimant receives a refund from the settlement. A reduction of the refund amount below $25 will only occur as a last resort."