I also work regarding Digital Magazines Ads brand searching and then tagging it with the correct brand. I worked for a Media Radar (mediaradar.com) project for 2 years where we used to search and tag the Ads by correct brand by using given database. There I used to finish 500 screen shots per person of online magazines per day. those screen shots contain both Auto box and manually boxed Ads. I can search all types of Ads search ( Classified ads, Animated ads, Expanding ads, Native ads, third party sponsor links. etc )