MediaDefender is widely known for their anti-piracy operations, spoofing and decoying on file-sharing networks for the entertainment industry. The company is doing more than that though, as we recently found out that adult affiliate programs were a significant source of income for them too.
MediaDefender Secretly Sells Porn to P2P Users | TorrentFreak

"So p2p is baaaaaad unless we can profit from it!"
They've spamming the Gnutella and eD2K networks with links to their porn affiliates so that they can get revenue, another thing we can add to the list...