Unlike legitimate services such as Netflix or Hulu, 123Movies did not pay royalties or licensing fees. Instead, it aggregated video files hosted on third-party servers and embedded them on its own indexing site. The platform generated revenue primarily through intrusive pop-up advertisements and malicious redirects, which often posed cybersecurity risks to its users.

123Movies: The Rise and Fall of a Pirate Streaming Giant

Authorities, including the Motion Picture Association of America (MPAA) and various international copyright offices, consistently listed 123Movies as a "notorious market" for piracy. Using such a service violates copyright laws in most jurisdictions (e.g., the Digital Millennium Copyright Act in the U.S. and similar regulations in the EU and Asia). Legal consequences for operating the site included lawsuits and criminal charges, while users faced potential fines or malware exposure.