About the passive income, I know two types for increasing income: linear growth and exponential growth. For a simple example, the linear income growth means you sell your time to only one client, if you want to earn more money, you have to spend more time on more clients, such as doing the outsourcing projects.
I remember my original purpose of using WordPress is blogging, just share my life or knowledge on my personal blog. After I quit my job and started WordPress business, I focused on thinking about how to make money with WordPress. Besides selling WordPress products( themes, plugins or service), blogging is another important way to earn money with WordPress. So, in this article, I will introduce 3 effective ways to make a profitable blog.