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I had several CLI denials early last year. I stopped requesting for about 9-10 months and since they have approved two CLI's one from 10k to 18k and the other from 2k to 14k. Same story with my wife 10k to 22k. Waiting on her new platimum card with a $4,500 SL to be eligible, should be interesting to see what she gets. We will likely just wait for the next AR.
From my dealings with them so far the 24hr message usually means denied. lol That's probably just me tho.