Residual income is the amount of net income generated in excess of the minimum rate of return. Residual income concepts have been used in a number of contexts, including as a measurement of internal corporate performance whereby a company's management team evaluates the return generated relative to the company's minimum required return. Alternatively, in personal finance, residual income is the level of income that an individual has after the deduction of all personal debts and expenses have been paid.
To further explore the effects of social capital and social relationships on MMOs, Steinkuehler and Williams combined conclusions from two different MMO research projects: sociocultural perspective on culture and cognition, and the other on media effects of MMOs. The conclusions of the two studies explained how MMOs function as a new form of a "third place" for informal social interactions much like coffee shops, pubs, and other typical hangouts. Many scholars, however, such as Oldenburg (1999), refute the idea of a MMOs serving as a "third place" due to inadequate bridging social capital. His argument is challenged by Putnam (2000) who concluded that MMOs are well suited for the formation of bridging social capital, tentative relationships that lack in depth, because it is inclusive and serves as a sociological lubricant that is shown across the data collected in both of the research studies.[17]
There are quite literally hundreds of clever ways to make money online. From taking online surveys, to renting or selling your old clothes, flipping your iPhone to someone in a different country, and even buying low-cost products locally, just to resell them for a higher price on Amazon. There’s truly no shortage of unique ways to make money online.
You'll also need ecommerce software, fulfillment software, worry about warehousing, customer service, refunds and so on. But that's not all. You'll also need traffic. Think search engine optimization, Facebook ads, and other social media campaigns. Sound like a lot of work? Sure, it is. Especially if you do it all on your own. You could opt for Amazon's platform, which might be the easier route. But, then again, at the end of the day, this is a serious business, which could produce significant profits. So you're either all in or you're not. 
I recently stumbled on the Trim app and I have to say, this one is a game changer. It’s a simple app that acts as your own personal financial manager. Once you link your bank to the app, Trim analyzes your spending, finds subscriptions you need to cancel, negotiates your Comcast bill, finds you better car insurance, and more. And of course, the app is free! My bet is that it will only take a few days for Trim to put an extra $100 in your pocket. So easy!