Also, in Sydney, quite a few of these make you sign away the rights to the end result in exchange for the prize. (Free publicity and you can work on it further

Also, in Sydney, quite a few of these make you sign away the rights to the end result in exchange for the prize. (Free publicity and you can work on it further for funding as a contractor). Imagine if you actually had a good idea and you came to one to colaborate and ended up losing your rights to your own idea.