Re: AMEX Membership Rewards Options
If you have the Blue card, there is no fee for MRO - even if you enroll other cards that require a fee.
For example, I enrolled my Blue and Green at the same time. The Blue was free and the Green was $15, for MRO. But the website said that AmEx would only charge the lowest fee available on any one card for both cards. So both my cards were enrolled free. The website is actually very nice and user friendly wrt MRO enrollment.
Regular Membership Rewards is a different story, though...
AmEx Blue 8.49%
BofA Platinum 10.99%
Capital One Platinum 8.99%
Chase Platinum 6.99%
Citibank Platinum 7.99%
MBNA Quantum 9.49%