Mockbusters have a long history in Hollywood and elsewhere. Such films tend to fit the classic B movie model, produced on a small budget and derivative of the target film and other similar projects. The reduced costs made available by using modern video and computer graphics equipment, and the tie-in to the mainstream film's advertising, has allowed the mockbuster to find a profitable niche in the home video market. Blockbuster , at one time one of the largest DVD and video game rental chains, gave implied support to the concept by buying , copies of The Asylum 's version of War of the Worlds in time to coincide with the theatrical opening week of Steven Spielberg 's film based on the same novel starring Tom Cruise. The film Angels Revenge bore many superficial similarities to the popular TV series Charlie's Angels ; its promotional materials even resembled Charlie's Angels' graphic style.