There are two kinds of companies, those that work to try to charge more and those that work to charge less. We will be the second.

Jeff Bezos is making a joke about the differences between companies. He's suggesting that there are two kinds of companies: those that try to charge more for their products and services and those that try to charge less. He's saying that Amazon, the company he founded, will be the latter. He's implying that Amazon will always try to provide great value to customers, even if it means that they don't make as much money as other companies. The joke is that Bezos is suggesting that Amazon is the kind of company that puts customers first - even if it means they don't make as much money as their competitors. It's a funny and witty way of poking fun at other companies that may put profits ahead of customer satisfaction.