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I thought I'd add, for anyone else who's still curious out there, I have one of these cards and they do give cli increases. I had my card probably 18 mos. already when I happened to ask about it during an unrelated customer service call. I was told that after a year I was eligible but apparently you have to ask. There was no fee associated with it but it was only for $125.
I agree get rid of the junk cards. Save you money also.
I don't recommend the "shark" cards. If I had to do it all over again, I would have saved up money and got a secured card. At least I would have got money back instead of wasting it on exorbitant AFs. My "shark card" was Credit One, so I have no direct experience with these cards.