Try looking up one called "CreditOne", just for an example. They look very similar to the "CapitalOne" card but are a card clearly for losers. I'm surprised CapitalOne doesn't sue them for trademark infringement, but they maybe get a cut of the action.
In a former life, I was in the licensing business and dealt with this type of thing on a regular basis. It is, as one of my colleagues said about Pierre Cardin, they would allow their logo to be used on a condom if the price was right.
Thanks ... very interesting. And yes, the Credit One and Capital One logos are very similar ... Can you imagine a company calling itself Kako Kalo and using its name, underlined and in cursive, as its logo?
I bet that they are the same company.