Has anyone had any success in getting Citi to change their card from Visa to MC or MC to Visa? I don't have a MasterCard and so I wanted to change my ThankYou card to a MC. I also wanted to "upgrade" (I don't see any difference) to preferred. The customer service person put me on hold and asked his supervisor and he told me that I would need to re-apply to get the preferred card (again, I don't see the difference...I just asked to switch out of curiosity) and I was also told that I would be unable to change my current ThankYou card from Visa to MC. I've read in other posts that other banks, like Chase, will change payment processors upon request.
Thanks 
Edit: I just did some searching and I now see that the preferred is apparently for people approved with a 5k or above limit?
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