There are now two ways to sell on Etsy–physical and digital products. With physical products, you can either create something unique such as jewelry or buy and resell something–for example, vintage clothing. Etsy has been a great marketplace for a long time, helping creative people sell their goods. The problem is, selling physical products isn’t exactly passive income.

Thanks for the great article…although I have to point out many of the items listed are not passive but active, such as selling bodily fluids, writing blogs or resumes, and collecting bottles and cans. To be truly passive, the income source must require no effort on your part (after initial setup). Real estate, dividends, P2P lending…these are truly passive income sources.
Speaking of Mad Men during the third season of Mad Men they worked to create buzz through an application called Mad Men Yourself.  The application as an avatar creator that helped you to create an avatar that made a 60s stylized version of yourself.  The site received over half a million visitors the first week.   After five years you can still use the application, and it's going strong.
If you offered Prismacolor pencils in your online store, you have the option of promoting the GIF through your own social channels in an attempt to get engagement from your own audience using a piece of content that is proven to be viral with general audiences. Depending on the creator of the content, you may be able to upload the content to your channels directly to share or you may need to re-share the content from the creator’s original social post, YouTube channel, website, or other direct link. Your post (or re-share) would include a link to Prismacolor pencils for sale in your online store.
The most viral products are those that only work if they are shared. For example, Skype only worked in the early days if you got your friends on to Skype, otherwise you had no way to call them. If you have an application today, think about how you can make it social, where it would work better by sharing data with friends/co-workers. That provides a great incentive for customers to invite their friends/colleagues to use the application.
With $200,000 a year in passive income, I would have enough income to provide for a family of up to four in San Francisco, given we bought a modest home in 2014. Now that we have a son, I'm happy to say that $200,000 indeed does seem like enough, especially if we can win the public-school lottery to avoid paying $20,000 to $50,000 a year in private-school tuition.
Passive income differs from earned income and portfolio income in a variety of ways. Passive income is generally defined as a stream of income earned with little effort, and it is referred to as progressive passive income when there is little effort needed from the individual receiving the passive income in order to grow the stream of income. Examples of passive income include rental income and any business activities in which the earner does not materially participate during the year.
A truly viral product emerged from targeting a truly viral problem in the digital age, known as attention deficit disorder. Allowing people globally to channel their nervousness into an entertaining handheld device has allowed for the viral spread of Fidget Spinners. The products modest beginnings spread virally through school children and later through to adults. We started seeing fidget spinners in social media, memes with fidget spinners, fidget spinners distracting people while crossing the street, and of course, fidget spinners in the impulse purchase section of your local supermarket. This little product achieved a viral marketing status through providing a ‘solution’ to a viral problem and bringing about a world full of fidgetty temptation.