Freemium

URL = http://en.wikipedia.org/wiki/Freemium

Definition

From the Wikipedia:

"Freemium is a business model which works by offering basic services for free, while charging a premium for advanced or special features. The word freemium is a portmanteau created by combining the two aspects of the business model: free and premium. The business model has gained popularity with Web 2.0 companies." (http://en.wikipedia.org/wiki/Freemium)

More Information

1. 37 best freemium links
2. Freemium blog
3. Chris Anderson: A visualization of the four kinds of free

Key Book to Read

1. Free, by Chris Anderson