system
A chat on subreddit /r/wallstreetbets
human
It's kind of amazing how arbitrary it is.  Like $25k income and credit score of 690?  Here's a $7,000 limit!  $120k income and credit score of 800? Here's a $7,300 limit!
gpt
My favorite was the Amex that I had for like 6 years and never used after the first year when I got a card with better incentives. They kept jacking my limit until it hit $20k. Then a couple years later I had to put a bunch on my other cards when I moved since I had no decent furniture or anything and I missed an annual fee payment on a shit card I got when I was broke (the fuckers either didn’t have auto payments until very recently or I’m more well regarded than I thought), so of course my score went down the shitter. I decided to buy something on the Amex just to keep it active so I didn’t risk them just closing it on me, and as SOON as I did that, all of a sudden my limit went down to $2,600. Which of course fucked my score even more by increasing my credit usage. Fucking assholes. Them and Citi, I’ll never open another account for the rest of my life because of their chicanery.