The service ValueClick, Inc. offers and how malware/spyware authors are using it is the reason for me giving them a low ratings.
ValueClick, Inc. (NASDAQ: VCLK) is one of the world’s largest integrated online marketing companies. They deliver scalable solutions for advertisers to cost-effectively acquire customers and for publishers to maximize their revenue. http://www.crunchbase.com/company/valueclick
ValueClick is an online advertising network or ad network. A company that connects advertisers to web sites that want to host advertisements. http://en.wikipedia.org/wiki/Ad_networks
More on why this company should be blacklisted here - Winfixer and ValueClick - http://goo.gl/62DGG and here -Valueclick and Winfixer continue to be a problem - http://goo.gl/LyNDV