Your credit score actually goes down when you pay off and close accounts. Which would indicate you're very financially responsible and will pay your debts off.

The reason is because a credit score is not about whether you will pay your debts and are financially responsible. It's actually configured to be a score of how much money a lender can make from you. If they can't profit from you, they don't want to lend to you. So the score goes down.

If it was a score of financially reliable and stable you are, then it would be much more welcomed.