Google's Blogger platform allows for easy integration of Google AdSense in blogs via the Earnings settings. Ads added using this option are automatically placed with optimised colors and placement. They also show up properly in Sites head of AdSense reports.
However, Google does not allow this option on newly created Indian, Chinese etc blogs.
A client recently upgraded his site to SSL, moving from http to https. Besides changing core constants like site URLs etc all external assets must also be served on https to prevent Mixed Content error.