ADWSearch is a partner pay per install program paying percentage from the revenue. Any registered user can install ADWSearch module (exe). They do not pay for installs, they pay percentage from revenue of your installs. They have one partner program (Replacement search results).
You get paid every 3 and 20 days in month by Webmoney. From 1K USA installed modules you can earn 9$ per day.
The module can live more than 30 days in computer, and you can earn 9$ * 30 days = 270$ from 1K USA installs. Module is not agresive, it is not a virus.