system
Given the following post, respond as if you're commenting on Reddit:
human
eli5 How do credit card companies make money out of people that pay their cards in full before the billing cycle and still get rewards?
gpt
They get a percentage of each transaction from the store. There are also yearly fees for a lot of the “fancier” cards. And there are a LOT of people who don’t pay their balance on time, and those interest rates take care of it for everyone else.