American adult pay-per-view television is presently unregulated since it is not technically "broadcasting" as defined in the Federal Communications Act. Cable and satellite television networks host about six main adult-related channels. Most of them (particularly Playboy TV, Penthouse TV, and Hustler TV (there is also a "Hustler Video", a line of raunchy films created by Larry Flynt)) are maintained by three mainstream porn magazines. In 1999 Playboy Enterprises sold to Vivid Entertainment a small channel which was renamed to Hot Network. Since that Vivid launched two more channels—the Hot Zone and Vivid TV. The viewers paid close to $400 million a year to tune into Vivid's hardcore content and the company soon overtook Playboy as operator of the world's largest adult-TV network. However, after passing the 2000 "United States v. Playboy Entertainment Group" case Playboy bought all three networks from Vivid in 2001 and folded them into "Playboy's Spice" brand. Operators then shunned "Playboy's Spice Platinum", a new group of channels with graphic hardcore fare.