Scales easily from small to very large. To spread like wildfire, the transmission method must be rapidly scalable from small to very large. The weakness of the Hotmail model is that a free email service requires its own mail servers to transmit the message. If the strategy is wildly successful, mail servers must be added very quickly or the rapid growth will bog down and die. If the virus multiplies only to kill the host before spreading, nothing is accomplished. So long as you have planned how you can add mail servers rapidly, you’re okay. You must build in scalability to your viral model.

Some good writing here! I am a realtor myself and frequently get in touch with clients that consider buying a realty estate a conservative of investing. I once heard of a transport company in Vienna, Austria, which focused their entire profit on buying eventually every house available in the downtown for about 80 years. That must be some of a passive income!

What I Do: I’ve set up multiple investment accounts outside my main operations bank that deals with working capital e.g checking, paying bills. By transferring my money to a couple brokerage accounts and two other banks as soon as it hits my main bank I no longer have temptation to spend on frivolous things. As a result, I can wake up 10 years later and reap the rewards of compounding. My 401(k) is the best example where constant contributions over 18 years has grown to over $500,000 without any savings pain given it just became a part of life. Real estate is also a fantastic asset class for the long term. It’s fantastic to enjoy your home, pay down your mortgage each month, and end up with a paid off asset that has likely appreciated during your time of ownership. 
The five forces model of analysis was developed by Michael Porter to analyze the competitive environment in which a product or company works. Description: There are five forces that act on any product/ brand/ company: 1. The threat of entry: competitors can enter from any industry, channel, function, form or marketing activity. How best can the company take care of the threat of new entrants? 2
What happens when you grow so fast that you start to saturate the population. This has happened to several Facebook app developers. They experience very rapid growth, and then suddenly the growth dies. Andrew Chen has written a great blog post about this:  Facebook viral marketing: When and why do apps “jump the shark?”. (Side note: I don’t believe that the equation that Andrew puts forward for simple viral growth is correct, as it assumes that the entire population will continue sending out invitations at each viral cycle. However his work on saturation of the population is very relevant for highly successful viral apps.) In case you are interested in where the term “jump the shark” came from check this out: Wikipedia: Jumping the shark.
What happens if you have attrition in your customer base over time. An easy way to extend the model to take this into consideration would be to add a variable to model Attrition Rate as a percentage of the entire installed base at each cycle, and simply subract this from the total population at each cycle. This topic is nicely covered in this blog post by Andrew Chen: Is your website a leaky bucket? 4 scenarios for user retention.
On-demand: More than a decade after “The Blair Witch Project” and its viral-before-viral-was-a-thing campaign, the producers of “Paranormal Activity,” who made their 2007 film for about $15,000, invited those interested in the film to demand their local theaters show the movie. The result? A wide, nationwide release and more than $107 million in box office revenue in the U.S. alone. (2, 3)
Crowdfunding is a newer way to invest, having emerged onto the scene just within the last few years. Most people have heard of sites like Kickstarter and GoFundMe, and a very similar concept exists for real estate. Developers are always looking to raise capital to fund their projects. Through the various online platforms, investors have access to these projects and can choose to invest in both residential and commercial properties. See the List of My Favorite Crowdfunding Sites.
This is mostly passive once you have it all set up, but it does take a lot of work at the beginning. Real estate investing also requires occasional maintenance. Currently, we invest in a couple of rental properties and earn about $500 profit from each per month. You can read more about my rental properties at How and Why I Became a Landlord.
Dove monitored the campaign in real-time, responded to conversations and optimized its activities for better engagement and market penetration, ensuring the video was seen by the right people. It is crucial for you to track the results of your campaign. By using the technology you too can deliver an omni-channel customer experience. Analytics will give you in-depth insights into your customers and capture their buying behavior.
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Remember, a successful business solves people’s problems. At first, you’re going to have to do the legwork and put in the time. But it’s about building something now so you can reap the benefits later, with the help of software, tools, automation, and people you hire. In this way, you can then turn this business that solves people’s problems into something that generates passive income for you!
I get excited every paycheck because I know my investments are going to increase by a decent chunk. I use Mint to keep a close eye on what the current value is at and make goal marks to hit. Every time I hit a goal, I do a little happy dance and decide what I want my next marker to be and when I want to hit it by. I’m nowhere close to being financially independent or even debt free, but it’s exciting to see the ground work being laid and watching it grow.

Etsy now allows you to sell digital products in your store. This can be anything from a picture that someone can download and frame to a guide on how to create a budget in PDF form. The possibilities for you to be creative are endless. The nice thing is, once you create a digital product for Etsy, you upload it and you can sit back and watch the sales come in (assuming your digital product is awesome).
I need to create a passive income stream that has a definable risk profile.I have $250k cash as a safety net in my savings account getting a measily 40 bps but I am somewhat ok with this as it is Not at risk or fluctuation (walk street is tougher nowadays). i have 270k in equity in my house, thinking of paying off the mortgage but probably does make sense since my rate is 3.125 on a 30 yr. I have 275k in my 401(k) and another 45k in a brokerage account that is invested in stocks that pay dividends.
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.