Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online.
For example, what are the quality and quantity of the links that have been created over time? Are they natural and organic links stemming from relevant and high quality content, or are they spammy links, unnatural links or coming from bad link neighborhoods? Are all the links coming from the same few websites over time or is there a healthy amount of global IP diversification in the links?
The allure of so-called internet riches is nothing new. At every bend and turn in a gauntlet of online gurus, you'll find internet marketers looking to hype up this supposed dream of making money online or earning passive income while kicking up your feet and letting the cash roll in. While internet marketing doesn't quite work that way, in that you actually do have to put in the work, it isn't too difficult to separate the proverbial men from the boys when it comes to the real online earners.