If you give your work over to a real publisher, he retains all copyright to that work. You basically sell your story and lose the right to ever sell it again. One of the points in any publishing contract I have ever seen or signed is that you agree that the work will not be displayed anywhere else or sold to anyone else. If you publish a story on this forum and lose the right to remove it, you lose the opportunity to ever have it published. Let this serve as notice to anyone who is unfamiliar with publishing contracts who wishes to enter the contests.