Interesting article on the value of email blog subscriptions

Smart publishers know the value of analyzing their metrics. Here are some interesting results from the Online Marketing Blog on RSS readers (and an emerging online marketing field called social media optimization). From the article:

Also, the FeedBlitz RSS to email service consistently ranks in the top 3. If you’re not offering a RSS to email option for users on your blog, you are missing out on potentially 15-30% of your possible subscribers.