Study Finds Record Number of ‘Action Codes’ Printed in the Top 100 U.S. Magazines: QR codes, digital watermarks, image recognition and other types of mobile action codes printed in the top 100 U.S. magazines reached a record number in second quarter, according to a new study by mobile marketing and technology services company, Nellymoser Inc. A total of 2,200 codes were printed during the quarter, up from 1,365 in the previous quarter (61 percent growth). More than 10 percent of advertisements contained a code, which was double the 5 percent rate from just one year ago.