Your question is How American Express Earns Revenue. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How does American Express earn revenue, and what costs does the company bear?
Keep your answer focused on the main revenue streams and the major expense categories. If helpful, distinguish between cardmember spending, fees, interest, rewards, and operating costs.