Copyright is an interesting beastie, and a very necessary one. Without Copyright law, most open source licences and Creative Commons licenses would be worthless. Copyright is enshrined in the United States constitution, offering a limited-time protection on works to everybody. That includes folks like you and me who don’t have works worth hundred of millions of dollars, and who might not have the ability to mount a lawsuit.
Copyright is for everybody, even if your means are scant and your works only commercially worth a few cents. That’s why the United States Copyright office wants to hear from you, as a part of a congressional enquiry into remedies for Copyright small claims.