Note that many websites have their own advertising, unrelated to adware.
From the Website:
The NETWEBSEARCH TOOLBAR, in the course of processing a given search query, sends a request to our servers. This request includes the keyword query, time of day, browser type, default language setting, IP address. The NETWEBSEARCH TOOLBAR also sends a configuration request when you start your browser. This request is approximately 5k in size and includes only anonymous data such as IP address, browser type, and information about the specific release date and distribution source of your NETWEBSEARCH TOOLBAR.