The advantage of Blogger is the ease of use. They make it so easy to start a blog it’s crazy. Yes, it’s a little cumbersome to change the default templates if you’re not experienced on the web. Yes, Blogger is not as flexible as WordPress. Yes, I don’t like the navbar that’s forced on me if Blogger is hosting my blog. Even so, I think the ease of use factor that Blogger provides is the key. For blogs with heavy traffic that generate revenue I use WordPress. For less active blogs I prefer to use Blogger.