<prompt> Human: So responsible with my credit cards, I had 3 and always payed them off in full every month for many years, and one of which I havent used at all in just as long. Found and applied for a new one because the rewards were better. Would it be of any benefit to cancel one of these credit cards since I now have 4 of them?  <response>: I have 9. I apply for a new card every 8 months or so 