<prompt> Human: This is an honest question about why Visa would even consider leaving my card open after my history... and in this case, my history is too good! Im not gloating or bragging, Im legitimately curious about this.. let me explain.I have an Amazon.com Chase Rewards Visa with a 6000 limit. I got it because I buy stuff from Amazon all the time and like using the rewards points on toys like video games. Basically I buy everything I can with my card and pay it off immediately. Im pretty sure I have never kept a balance on my card not even for a month, so Ive never actually accrued any interest. Ive probably gotten over 200 in Rewards points on this alone. Its not a lot, but still, they havent profited off of me at all... at least not that I know of.Flash forward to this Christmas. I drive an old 92 Chevy Caprice never made a car payment in my life, and my insurance is super low! and wanted to go visit my family in the next city over for the holiday. I decided I didnt want to put a lot of miles on my old car so I rented a car from Enterprise. I did a bit of research and found that Visa offers Auto Rental Collision damage coverage if you rent the car on your Visa and opt out of the rental agencys insurance. I did that, but never expected to actually have to use it. Well, the worst case scenario happened... sometime when I wasnt even driving the vehicle, someone scraped up against the side of the car, leaving a nice paint scratch on the rear driver side wheel well. I didnt even notice it until I dropped off the car and it was inspected by the rental agency. They said I was responsible for it, so I scrambled to figure out the Visa coverage.Long story short, I just got the letter today informing me that my claim was approved and Visa covered the bill of 922.39!! Which is CRAZY! All I did was rent the car with my card and paid it off immediately and they had to shell out 922.39! I actually feel strangely guilty right now, because I cant imagine any possible way that Visa has benefited from having me as a client. Do they just do so well from other people using credit irresponsibly that they can eat these costs without much worry? Or should I not be surprised to get a letter in the mail soon informing me that Im not worth keeping around?Also, I feel like I should do something for Visa now. Personally I dont think credit is something that should be celebrated because it is dangerous for people that arent responsible with their money admittedly this is probably a really naive view of this, but they have been nothing but good for me. Should I send someone a thank you letter? Do they even care? TL;DR: Visa has paid over 1000 in benefits to me or in my favor, and Ive never accrued interest. Why do they keep me around?  <response>: Interchange fees paid by the merchant. The fee amount varies by card type, but when you buy 100 worth of stuff from Amazon, Visa gives Amazon 98. 