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My CL was also a HP. But it was a good HP since it and the earlier Chase CL I did allowed me to get a PenFed at the amount I wanted.
I just did a CLI on my BofA Platinum a couple days ago. Used the online request on my account page. I went from 7K to 11K. Utilization at the time was about 40% because I am still in the 0% promo period. The card has been open about 9 months. Hard pull on TU (I found out later) but the online approval was only about 30 seconds. They requested income and housing info.