Identify the business model of existing companies

Pick one of the companies or divisions, analyze their product business model. These are: Visa credit card, the Frequent Flyer division of United Airlines, the search box suggestion box of Sogou.com, the Goodyear Blimp.

Bonus question 1

Find the financial statement of publicly traded companies and divisions and confirm some of your estimates.

Bonus question 2

Can you design a business based on the models that you have studied?