But there are more practical reasons that sites like Alluc.org get away with what they’re doing. One is that there are simply too many of them to keep track of. Media companies’ lawyers rarely have time to police so many obscure sites, and even when they do, users can always upload the infringing files again. So the flow of copyrighted streaming video continues.
The answer there is simple. There are far too many online pirates and too few lawyers. Once one site is shut down, another is started. It’s a complicated circle.
Source: Forbes