Well, Rob is right. What exactly is your definition of a passive income online versus an active income online? Personally, I've always viewed having an active income as performing a service or action and getting paid for it. Basically, more involved and engaged with the project. With a passive income, I'm not as engaged with the project. However, I'm still earning a profit from the revenue earned because I'm in a partnership with someone else who equally put in the time/energy to set up the project.
In my opinion, I like an active income because it's guaranteed payment for an action or service performed. A prime example of this would be freelance content writing online. Getting paid per article published by a website. However, passive income is around the clock and doesn't require your energy output 24/7, because you're constantly earning. Another prime example would be hiring a content writer to write articles for your website. Once published, the content is there forever and as long as the site is monetized, you constantly earn from that content even when you sleep.
So one is more short-term, while the other presents more of a long-term strategy.