they dont get it. a business exists to make money. a businees makes money by selling a product/service. you sell a product/service more effectively by advertising. you advertise more effectively by researching demographics. if the research tells you black people have lots of money, you sell your product to them. they are not forced to buy it. however some would say that they are forced to buy it indirectly by brainnwashing and coercion. apprently some people do not have the education required to filter media. it could just be that some people are materialistic and buying things makes them feel good. anyway...why should person A care how person B spends their money?