I was doing some research to help a friend when I stumbled across a website that provides information/service in a very narrow market. I realized that their service could be applied to a vastly bigger and broader market that is totally unrelated. I could take my idea and run with it, copying a lot of their methodology. But that would take a lot of time and require a lot of expertise that I don't have. They already have everything up and running smoothly and it would just require a little tweaking to apply my ideas. So I would like to approach them with my idea and, if they go with it, I'd like to receive a continuing royalty. But how can I present my idea to them without them just taking my idea and running with it while cutting me out? From what I have seen, my idea could multiply their earnings.