I see you include rental income, e-book sales and P2P loans as part of your passive income. Do you not consider your other internet income as passive? Is that why it’s not in the chart? Or did you not include it because you would rather not reveal it at this point? (I apologize if this question was already answered – I didn’t read through all the comments, and it’s been about a week since I actually read this post via Feedly on my phone)

The financial services industry contributed $809 billion (37% of GDP) and employed 14.17 million people (3% of the workforce) in 2016, and the banking sector contributed $407 billion (19% of GDP) and employed 5.5 million people (1% of the workforce) in 2016.[153] The Indian money market is classified into the organised sector, comprising private, public and foreign-owned commercial banks and cooperative banks, together known as 'scheduled banks'; and the unorganised sector, which includes individual or family-owned indigenous bankers or money lenders and non-banking financial companies.[202] The unorganised sector and microcredit are preferred over traditional banks in rural and sub-urban areas, especially for non-productive purposes such as short-term loans for ceremonies.[203]
If you have a blog or other type of site, you can build affiliate links to different services on the website. Many people use Amazon as an affiliate partner. For example, if you are a beauty blogger writing about different products, you can set up Amazon affiliate links on your blog so that whenever someone buys the product you mention on Amazon, you receive a percentage of the sale. Amazon is not the only affiliate partner out there. Here is good, in-depth information on affiliate marketing. 
​Network marketing, or multi-level marketing, seems to be on the rise. Companies such as Young Living Oils, Avon, Pampered Chef, and AdvoCare are all multi-level marketing companies. You can earn passive income through network marketing by building a team underneath you (often referred to as a down line.) Once you have a large team you can earn commissions off of their sales without having to do much.
Sam…just read this article and I want to say that this is the best posting on passive income I have ever read…in a blog, article, or book. Thanks for making a difference and being an inspiration as to how it can all be accomplished. One of the great benefits of the internet is that people are willing to share their stories and experiences with each other online. If we had this when I was working professionally (20-40 years ago), it would have saved me from making some rather poor financial decisions that affected my retirement income. In a way, the internet is making up for the loss of financial security in the loss of The Defined Benefit Plan for retirement. Bravo!
According to 2011 census data, India has about 330 million houses and 247 million households. The household size in India has dropped in recent years, the 2011 census reporting 50% of households have four or fewer members, with an average 4.8 members per household including surviving grandparents.[331][332] These households produced a GDP of about $1.7 trillion.[333] Consumption patterns note: approximately 67% of households use firewood, crop residue or cow-dung cakes for cooking purposes; 53% do not have sanitation or drainage facilities on premises; 83% have water supply within their premises or 100 metres (330 ft) from their house in urban areas and 500 metres (1,600 ft) from the house in rural areas; 67% of the households have access to electricity; 63% of households have landline or mobile telephone service; 43% have a television; 26% have either a two- or four-wheel motor vehicle. Compared to 2001, these income and consumption trends represent moderate to significant improvements.[331] One report in 2010 claimed that high-income households outnumber low-income households.[334]
Thanks for the info…I kind of figured it is really not that expensive to live if you are not an extravagant person. I could definitely figure out how to funnel expenses through a part time business…I think I keep thinking along the lines that I’m going to be paying the same tax rate after retirement, but reality is you could get pretty lean and mean if one focused on it. On a scale of 1-10 with 10 being utter panic mode, how worried are you about your “pile” lasting through a 50 year retirement now that you are a couple years into it?
If you’ve been passionately collecting something over the years, this may well be your route to extra income. Be it comic books, records, stamps or even vintage clothing you picked up from second-hand stores, the chances are likely that there is someone out there who shares your passion. Whilst sites like eBay and Amazon are ideal for generic selling, if your collection consists of more niche items, you may need to use a more specific platform.

We’ve discussed how to get started building passive income for financial freedom in a previous post. Now I’d like to rank the various passive income streams based on risk, return, and feasibility. The rankings are somewhat subjective, but they are born from my own real life experiences attempting to generate multiple types of passive income sources over the past 16 years.
“Start-up time” required: Poor – Experienced niche site builders will be well versed with outsourcing certain tasks and running through the whole process very efficiently, but when you first start out, it can take a long time to earn your first dollar from a niche site.  Doing research, designing the site, writing content, and doing proper SEO work can all be very time consuming, and the payoff isn’t always something you can rely on.
A number of operations have supported access to safe water sources and sanitation services, and the better management of water resources, including giving 4.2 million rural people an improved water supply (from 2013). A $250 million urban water supply and sanitation project is to increase the sustainable water supply and sanitation services in Addis Ababa and selected cities, providing one million people in urban areas with improved water sources, 2.7 million with improved water supply services, and 200,000 with sanitation services. A follow-on $445 million IDA credit was approved in March 2017.  Under its CPF, the Bank continues to support the government’s  goal of providing 100% national potable water supply coverage by 2020.
You can provide tuitions to many school or college going students if you are good in a particular subject. Teaching students is also a great way to earn money. This way you can also enhance your knowledge about the subject you were passionate about. You can also go online and register yourself at websites and portals. This way you can maximize your reach.
Now, all that said, if capital (savings) grows faster than the growth of the economy, those with savings will see their wealth grow at a faster rate than those who rely on the growth of their income. While this is not an extension of Piketty's argument (you can't take an idea that applies to a population and a whole economy and boil it down to the individual like this), it's not an unreasonable conclusion to take and apply to your own life. (Piketty does talk about this on an individual level, but says it's more impactful for billionaires vs. millionaires – though we have limited data into individuals)
And, let’s face it; not everyone wants to sling body wraps or nutrition shakes to their family and friends. That’s why offering a service is often one of the best, and least uncomfortable, ways to earn side income doing something you love. Maybe you want to clean houses or rake leaves or help people file their taxes. It’s totally up to you, and that’s the beauty of this option.