This is so different from other product or service-based companies. Imagine if you were a live yoga instructor. Maybe you can fit 20-30 students in your yoga studio. But after that, you’ll need to pay for a bigger room. Or you’ll need to teach more classes. If you taught a yoga class online, you can open it up to any number of students at practically no extra cost or effort.
Now this would usually be considered a risky or "blackhat" link building method that could get your websites penalized by Google. However, we aren't building the links directly to your main "money websites," we are building the links to your support layer of websites! This includes article directories, web 2.0 properties, and mini blogs that you've already created (taught in the prior lessons).