They included Spider-Man 2 together with the original Spider-Man on one DVD as a two-for-one "special offer".

BBC: NEWS | Entertainment | Tracking down the pirate DVDs

Today they average a remarkable rate of better than one sale for every two calls during which an offer is made.

ECONOMIST: Enterprise software

Paramount's offer: Pay full price for a one-day pass and get two visits.

FORBES: Free Fall