It's not the credit limit it is when they do a soft pull and like what they see. I've had my card over 6 years and my limit has gone up automatically by Leaps and Bounds but I still have not been offered because my util on other cards like lowes and carecredit are way higher than should be. it's a different bank but that is the same story with JCPenney. A lot of members are being upgraded and they don't have Sky High limits.
I'm also thinking if you do not have a lot of Visa MasterCards they notice and will give you the upgrade because there are people with really awesome profiles was a slew of visa signatures and they are not being upgraded
