ValueClick paid approximately $2.4 billion to acquire Commission Junction in 2003. This acquisition was a significant move for ValueClick. It allowed the company to expand its affiliate marketing network. Commission Junction was a leading affiliate network at the time. The deal helped ValueClick strengthen its position in the online advertising market. After the acquisition, ValueClick continued to operate Commission Junction under its brand. The purchase played a key role in growing both companies. Commission Junction remained one of the top affiliate networks after the acquisition. You can still see its influence in the affiliate marketing industry today.