I was stuck on one of my cards, but after doing a lot of research, it seemed that you have to be consistent for 3 months before they'll budge. At that point, I cycled my limit multiple times in a month, always paying at least 4x the minimum. Think it was 10 days after the 3rd statement that they finally gave me an increase. Gave me an increase that took my limit to what I was spending monthly. I have 2 other cards I'm going to test my theory on, just can't do it right now.
