Larry E. Wack Ryanna's Hope Advertising is a small part of marketing in general. Promotions such as coupons could be seen as the grandchildren of marketing.
Customers can be complex.
The reason for that is simple. This interaction placed them into a unique category of persons who could find later advertising jobs and write tremendous ads that would sell. In the 1990's we rarely see the likes of sales from 30's such as Claude Hopkins and others who became advertising wizards. Right brained people are motivated by emotional appeals. That simply means you'll only reach less than half of your total potential customers.