Note that many websites have their own advertising, unrelated to adware.
From their wesite:
Personalize your favorite file-sharing program with FileFreedom 4.0. Get file ratings, reviews, recommendations, most popular lists, intant messengers, playlist sharing, and a host of other unique features. FileFreedom works seamlessly with your favorite file-sharing networks, such as Morpheus, Grokster, BearShare, KaZaA, LimeWire.
Displays popups and popunders. Their site has been listed for sale. It is unknown if legacy versions are still in circulation.