This ad format was there from the start of the promotions tab; it's not new. Here's an article about them from June: http://googlesystem.blogspot.com/2013/06/a

This ad format was there from the start of the promotions tab; it's not new. Here's an article about them from June: http://googlesystem.blogspot.com/2013/06/ads-in-gmails-promotions-tab.html http://googlesystem.blogspot.com/2013/06/ads-in-gmails-promo...