Another possibility is that “7” denotes the seventh mirror or alternative domain of Moviesflix. Since the site constantly creates new URLs to avoid ISP blocking, users might type “Moviesflix 7” to locate the seventh working link in a series (e.g., moviesflix7.com, moviesflix7.net).
Ad-supported Hollywood releases legally licensed by major studios. Netflix / Prime Video Monthly Tiered 7 moviesflix