Mayer confirms Yahoo’s selling Tumblr ads through Facebook’s ad net

Facebook doesn’t offer a way for advertisers to buy its ad network ads completely, so these ads are simply extensions of their normal Facebook ad buys. The only difference is that they appear external of Facebook. They still run in front of Facebook’s viewers and, more importantly to Yahoo, are sold at Facebook rates. That could clarify why Yahoo can be inclined to take Facebook’s ads, which require Yahoo to pay Facebook 30 % of the ensuing income and give up its connection to these advertisers Facebook doesn’t tell publishers in its ad network which brands end up buying ads on their houses.