Can someone explain how it's possible that in some countries opening an ad in a new window is "expected internet behavior" while in other countries it is not? I thought opening an ad in a new window is an option that can be changed from Adsense options? Do Chinese people in masses set their browsers to open links in new windows?
Can I open the ads in a new window?
Generally, it is our policy to not allow Google ads to open in a new window. However, in a few markets, including China, we've found that opening ads in a new window better aligns with expected internet behavior and provides a more consistent, intuitive user experience.
If you use Ad Manager, you can set them to open in a new window. I did find this seemed to drastically inflate impressions, leading to lower CTR though. And I don't know if CTR has a direct influence on smart pricing, but I wouldn't be surprised if it did. It's pretty important on the advertising side.