<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why is mastercard a bad company?
<|assistant|>
Mastercard has been accused of overcharging stores that process credit card payments, as well as unfairly restricting store owners' right to pass on their processing fees to customers. The company has also been accused of rigging the foreign exchange market. Furthermore, many merchants have complained of poor customer service and the difficulty of switching to another processor.