There is another notable addition to the new terms and conditions:
(bolding mine)

Terms and Conditions:
AAdvantageŽ offer is valid on American Airlines marketed and operated nonstop flights for round-trip travel between Dallas/Fort Worth (DFW) and Boston (BOS), April 3, 2012, through June 30, 2012. Offer applies only to AAdvantage members who purchase and fly on published fare tickets. Registration prior to travel is required. A round trip is defined as two one-way trips booked in a single reservation under one ticket number. Reservations containing open jaws are eligible. Reservation must be booked on or after April 3, 2012, to be eligible. A maximum of one round trip is permitted per reservation. Double elite qualifying miles will be calculated at 100% of the base miles earned. This offer does not increment the member's prize eligible miles, elite qualifying points or segments. Bonus elite qualifying miles associated with this offer will be posted to the account of the traveling AAdvantage member within 6-8 weeks after qualifying activity posts to your account. Promotion does not apply to travel on mileage award tickets or fares that are ineligible for AAdvantage mileage accrual.