IAC still distributes the Ask.com toolbar which is installed on close to 100 million computers.
"The search business grew 20 percent, goosed primarily by a 55 percent increase in active toolbars to 97 million. IAC’s toolbar business is its secret distribution weapon"
"The search business grew 20 percent, goosed primarily by a 55 percent increase in active toolbars to 97 million. IAC’s toolbar business is its secret distribution weapon"
http://techcrunch.com/2010/10/27/iac-third-quarter-25-percen...
They get a ton of distribution from software installers that ask if you want to install other stuff during the installation process.