[VladRussian2]

best $7K spent:

http://venturebeat.com/2012/10/21/impermium/

"Rather than use an internal data services team, the company turned to Kaggle, a startup that hosts data-driven competitions.

From around the world, statisticians competed to build a tool that combines machine learning and natural language processing to root out malicious commentary. The winner received $7,000 — their solution was the most accurate with a false positive rate of less than one percent.

After posting the competition, the company received 154 submissions from contenders, and made some interesting discoveries about the nature of hate speech. "

[jboggan]

They probably spent twice that - Kaggle takes a cut.