Incredible work. You made something that someone would make by reading a bunch of rails beginner tutorials and you want to monetize your "work". I am sure that will be some people who will give you their hard earned cash, but when I see such mediocre approaches, I just want to scream. Moodle does what your open source creation does in much better ways. This project of yours should have been something to play around with to learn about rails, not a attempt to make money out of this.