It seems like foistware uses similar mechanism to ads. As I understand website ads work by having a placeholder linked to ads.com/intrusive/...?from-my-site,...
When visitor goes to the site this placeholder brings him to ads.com. Now ads.com check visitor's id cookie
(and drops a new one if isn't there). Finally is shows some ads.
Is my understanding of ads mechanics correct?
Is foistware mechanics similar to ads?