This is separated intentionally from “information products,” because here I’m referring specifically to secondary value creation. If you can write a popular blog and get people reading it, you can sell ads. Alternatively, if you write a niche blog about vegetarian, gluten-free cat food, you can use special affiliate links to different websites, and get paid when people buy through those links. There’s lots of great blogs making tons of money doing these two things (I know of people making millions referring credit card signups), but please note that unless someone is writing and distributing the content for you, this is not passive income. It takes a lot of work to drive traffic. Some of the smarter people I know doing this have hired content writers and set up a bunch of sites, but they invest a TON of time on SEO, finding the right topics, etc.
That $200,000 a year might sound like a lot to you, but the median home price in San Francisco is roughly $1.6 million or almost eight times our annual passive income. For a family of three in 2018, the Department of Housing and Urban Development declared that income of $105,700 or below was "low income." Therefore, I consider us firmly in the middle class. 

* I use Personal Capital to track all my finances in one place. It’s much easier to use their free software to follow 28 accounts on one platform than to log into various accounts to check my balances. They’ve also got great tools for x-raying your portfolio for excessive fees, recommending a more optimized asset allocation, and planning for retirement with their Retirement Planner.