4) Ashley Madison.com


Life is short, have an affair. Dating website for people already in relationships who want an affair.

Estimated profits for 2011: $20 million.


5) The Excused Absence Network


Provide fake doctors notes or jury summons so employees can take a day off.

Notes cost $9.95 each and the site is getting thousands of hits per month.


6) The Million Dollar Homepage


In 2005, Alex Tew launched The Million Dollar Homepage, through which he sold the pixels of a 1000×1000 grid for $1 each. The site earned $1,037,100 in a matter of months and the final slot on the page was sold for $38,100.