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You may not find yourself getting an SL of 5K as they may not see you having enough experience at higher credit limits, but that doesn't mean that you can't grow to that CL with responsible usage. You aren't judged by your age...you're judged by your credit profile. At 22, your profile isn't going to be that old obviously, but we all have to start somewhere! Good luck to you OP. If you will get use out of the Alaska card, go for it and good luck! They might surprise you.