US Airways has dropped both American Express Membership Rewards and Diners Club as Dividend Miles partners. As part of the merger with America West, certain partner “adjustments” have been made, including the loss of these two giants. Any point transfers made before 2006 are final and non-refundable. Wondering why? Odds are that Juniper Bank/Barclay’s required termination of these other partnerships as part of the nearly $350 million advance of financing receieved by being named the new credit card partner for the merged programs, which put Bank of America on the outside looking in — well, at the outside with a lawsuit. If you’ve ever wondered just how high-stakes these partnerships with credit card companies are, look no further than this, as well as the latest changes in the Diners Club Rewards program. It’s not viewed as a huge loss, because for the past few years, the interest in converting both Membership Rewards and Club Rewards points into Dividend Miles has waned in light of the financial condition of US Airways. There has been no announcement for America West FlightFund, which partners only with Diners Club Rewards, and this will likely go away once the program completes its merger with Dividend Miles in the New Year.