Originally Posted by
Nonesuch
...they call the "CitiŽ Diamond PreferredŽ Rewards World MasterCard ... offers Concierge Service (free), travel insurance, etc.
The concierge etc are standard features of MasterCard "World" products. I believe the merchant transaction fees are higher on World and World Elite cards than on Platinum, Gold, or Standard Mastercard. It sounds as if Citi may be converting cards to increase revenue.