Margin and volume are the key to advertising. Coca cola needs to sell a lot of extra coke to make a return, and they do. At the other end, car companies. You o

Margin and volume are the key to advertising. Coca cola needs to sell a lot of extra coke to make a return, and they do. At the other end, car companies. You only need to move a tiny fraction of people left or right on a $20K purchase to justify a hell of a lot of ads. 1,000 car buyers changing from a Toyota to a Hyundai is a massive return.