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Have you applied for a CLI and you were denied or are you saying you haven't applied and you were waiting for them to give you a CLI? For me they send a SP CLI offer every 1.5 - 2 years.
I don't think the credit card companies find one year of on-time payments to be *that* great. Could possibly be why you aren't getting that increase.
I'm curious to know this as well. If you are looking for a SP, it may be harder. You probably have to sacifice a HP if you want the CLI badly.