As much as you want to achieve your dreams, you still have to understand that your story is more important. Can the opportunity to achieve your dream tarnish your story and your worth as a writer? Don't do it. Do not sign it. A lot of people will take advantage of desperate writers wanting to be published. Don't let them have you; they are not your ally. You are the only one that your stories could depend on. Choose wisely. It's your story; you decide the worth of it. If there'll be no benefits on your side? Leave. Find another opportunity. You are a writer; keep your dignity intact.