Is it permissible to obtain paid courses for free from other websites?

If websites that offer courses and programs for free have infringed upon the rights of their owners by displaying them without permission, then it is not permissible to deal with them or take these courses. This is because it involves an infringement on the rights of the owners and participation with the aggressor in their sin, which is forbidden by the Almighty's saying: "And do not cooperate in sin and aggression." The jurists have stipulated that whoever takes from a usurper, while knowing of their usurpation, is like them.