Decreased use of credit is a good thing. I have an open account with Amex, and they sent me a letter, really rude, cutting my line from $20,000 to $8,000 because I was a bad credit risk. I had a WTF? moment, as my credit has always been great.
I checked my credit score and it was in the 770s. Then I realized the problem. When I opened the account I took advantage of their 1.9% until paid off and didn’t charge anything else on it. It’s not about me having good credit. It’s about them not being able to nail me with late payment fees and high interest rates. (Some) Credit card companies are jackals.
Will your credit score be reduced by them cutting your credit line?