The question of having a multimillion dollar empire with a blog is out of the question unless you own Facebook or Google or any of those sites. Blogs are quite unique. You can leverage from them and increase your earning using tried and tested techniques. It all depends on how much a rich person should be earning. Starting out with affiliate marketing can be a rocky road. You need to really take good care of your site and follow the rules of the program. It will catch on to you in the long run. As you start, you will realize some things that will be lacking about your content and you will be thinking of how you can maximize the appeal of your site to the rest of the world.
Affiliate marketing can offer so called residual income. It is a steady influx of income that could vary from time to time but nonetheless, comes in due to the links that are placed on your blog. Residual income varies in price range and that means that the amount of earnings will be different depending on various things like timing, content, visibility of the ads and many other related aspects. Of course the residual income will be affected by how popular your blog is and how they use your site. Understanding the attitude and likes or preferences of the audience will give you an idea as to what they might want to see more, how you will pace the blog and those aspects will determine how big your commissions can be.
Affiliate marketing can make you less worried about money most especially if you have a number of websites that are running affiliate programs. It takes a lot of work to make affiliate marketing to make sense in your blog but the results will definitely show up once you figure out the way to entice a bigger audience.