American Express Membership Rewards - Transfer Account Letter to AX Centurion Bank

I received my transfer of account letter, from AX Travel Related Services Company to AX Centurion Bank....

Can someone give me the "Cliff Notes" on the reasons for this?

This is a AX Gold that I have had for fifteen years.

No consequence to the cardholder, see discussion from March 12, 2007...

http://flyertalk.com/forum/showthread.php?t=670412

thanks....