When you invest in a dividend-paying stock, you are buying a share of the company and you literally become part-owner of that business. As the company grows and generates extra cash that it doesn’t necessarily want to re-invest, it might decide to return some of the extra cash to the shareholders in the form of dividends. And because you own a fraction of the company, you will receive a portion of the cash!

If an investor puts $500,000 into a candy store with the agreement that the owners would pay the investor a percentage of earnings, that would be considered passive income as long as the investor does not participate in the operation of the business in any meaningful way other than placing the investment. The IRS states, however, that if the investor did help manage the company with the owners, the investor's income could be seen as active since the investor provided "material participation." 
Passive income investments can make an investor's life easier in many ways, particularly when a hands-off approach is preferred. The four options outlined here represent differing levels of diversification and risk. As with any investment, it's important to weigh the anticipated returns associated with a passive income opportunity against the potential for loss.
Many entrepreneurs are asking if the new rules will result in them paying additional taxes if their corporations generate passive income in excess of $50,000. In most circumstances, the answer is that they will pay more corporate taxes, thereby reducing the size of their tax deferral advantage (from 40% down to 27% on their 2019 corporate income earned in Ontario).
If you have a capital loss on the disposition of an interest in a passive activity, the loss may be limited. For individuals, your capital loss deduction is limited to the amount of your capital gains plus the lower of $3,000 ($1,500 in the case of a married individual filing a separate return) or the excess of your capital losses over capital gains. See Pub. 544 for more information.
There’s a few different free routes you can take. You can release both a paid and free app and have your free app up-sell your paid app. This gives you visibility in both paid and free categories. More eyes could potentially mean more downloads and more revenue. The most popular route is the freemium version with in-app purchases. You give out the most essential functions of the app for free and up-sell your users to more features they might want. This usually converts better than up-selling to a paid app, since the user will never have to leave your app to make a purchase.
Try going to our post: 20 Sites That Will Pay You to Read Books: https://wellkeptwallet.com/get-paid-to-read-books/. Even though editing is not what this post is about, there are several companies that might do book editing such as Kirkus: https://www.kirkusreviews.com/editing-services/get-started/marketing/?utm_source=google&utm_medium=cpc&utm_term=%2Bbook%20%2Bediting&utm_campaign=Editorial-ES I hope this helps and good luck on your book!