Yahoo! Inc. (YHOO) In Play: ‘Hip’ Blogging Site Tumblr Could Be Hidden Gem That Seals A Deal

But while the ads and the blogs exist, and they’re evidently expanding, not every agency and company is jumping in to buy. “Pioneer brands have, and so have some of our clients.  It hasn’t gotten beyond test-and-learn with their ad products as they emerge, however,” Azher Ahmed, EVP and director of digital at DDB Chicago wrote in an email.