I run multiple content sites with advertising from multiple CPM providers. Across the board, this first quarter of 2013 has been even worse than normal for a first quarter. What do you think is causing this, and do you think it'll come back?
GoldmanSachs predicts continuing weakness in the global economy in 2013, worse early in the year but later getting a little better than most of 2012 was. I hope that's what we're seeing. They blame the "fiscal cliff" nonsense, and it does make sense to me that if the government just can't decide whether or not to tank its own credit, this is worrying businesses.
Also, mobile advertising. I'm seeing so many more mobile visitors, but I'm not sure the ad networks are prepared. Most of mine can't cope with a responsive design, and many (as has been lamented elsewhere with regards to Adsense) aren't creating optimal sizes for phones. (I've just turned responsiveness off in one of my site themes to see if the CPM gets better.)