Similiar to Adsense, powers the Yahoo! Bing Network Contextual Ads and is probably the second largest contextual advertising company in the world. I've been running some ads for a few months and the income was very similiar to adsense. Bear in mind that their approval process is a bit more extensive than Google AdSense. -One has to get a certain number of page views monthly to get an account with them.

"The majority of people I see who are interested in passive income and pursuing it, haven't learned how to create value in the first place. They're just trying to do gimmicks and tricks and formulas. They're trying to do the automation part, but they've missed the point that the automation only spits off cash if it's based first on automating something that actually creates value. If you automate something that is worthless---or worse than worthless, a scam -- it's not going to work in the long run."
One of the most appealing options, particularly for millennials, would be #12 on your list (create a Blog/Youtube channel). The videos can be about anything that interests you, from your daily makeup routine (with affiliate links to the products you use), recipes (what you eat each day) or as you mention, instructional videos (again with affiliate links to the products you use). Once you gain a large following and viewership, you can earn via Adsense on YouTube.
Who doesn’t like some down and dirty affiliate fees?!  Especially if you realize it can be even easier to make money this way than with an ebook.  After all, you simply need to concentrate on pumping out some content for your own site and getting the traffic in, often via Google or social media.  Unsurprisingly, most people can enjoy their first affiliate sale within 30 days of starting a blog.  Continue reading >
If you’ve got a book you’re itching to write, you can still go with the traditional publishing route. (We published our first book using a traditional publisher.) Whether your book is fiction or non-fiction, a publisher can help get your book into print and onto shelves in both online and traditional book stores. This is still a good route, although it may take more work and be more expensive than some other options.
Repackage your products. If you've already created successful content on a blog or website, you can convert that information into another form and sell it. For example, you can compile what you've written into an ebook and sell it on one of the ebook markets like Amazon or Barnes and Nobles. Alternately, you can use it to create an online course to sell on a website like Udemy. Reworking your content can earn you additional income streams without requiring you to actually produce new content.[13]
The much loved model for bloggers and content creators everywhere and for a good reason…it’s pretty easy to write a 60-80 page ebook, not hard to sell say $500 worth a month through online networking, guest posting and your own SEO optimized blog, and well you get to keep a large whack of the pie after paying affiliates.  Hells yeah!  Continue reading >