Their mileage-based credit card is not a very good deal (though it is very similar to that offered by many other institutions). While they call them "miles", you actually get points which can be turned into paid coach tickets. You cannot move the points to miles in other programs and the advance purchase requirements are tough:

25,000 A round-trip, coach ticket on any U.S. airline carrier for travel between and within any of the 48 continental states (all travel must originate in the U.S.). Airline tickets must be booked by the account holder at least 21 days in advance and must include a Saturday night stay. Tickets may be purchased in any individual's name designated. Ticket will be non-refundable and will be for no more than $500. Interim stops of over 4 hours are not allowed.