This is actually the reason McDonald's started taking credit cards. Studies find this again and again that people buy more when putting it on their credit card

This is actually the reason McDonald's started taking credit cards. Studies find this again and again that people buy more when putting it on their credit card. Do you think giving 2% cash back is just the credit card companies being generous? They are making way more through that scheme. Plus, those cash-back cards generally take a higher percentage which will lead to higher prices to compensate.