Not every form of advertising suffered last year. As the economy soured in the first half of 2009, retailers’ use of coupons soared. Retailer promotion pages surpassed 9.0 billion in 2009, up 37.7% for the year, “continuing the pattern of significant annual growth rates which began in 2007,” said Marx Promotion Intelligence, a division of TNS Media Intelligence. Of the 10 most active retailers in promotion pages circulated, just three are supermarkets: Kroger, Publix and...