Note that many websites have their own advertising, unrelated to adware.
From the Website:
YourSiteBar is an affiliate program that lets you build and customize your own toolbar using our web interface. Not only does that let you promote your own toolbar with your links and logos, but you also get paid each time a surfer installs it! This program is perfect to increase traffic to your site, build user loyalty and make money all at the same time. YourSiteBar is sure to make you rich! Great promotional materials such as banners and full page ads for all niches