I have a great idea that would get me and the people that do it more traffic. But how do I contact others without someone taking the idea and running with it before I do?
You would just have to do it yourself, then hope you have enough of a lead time that all the copycats are too far behind (it happens to me all the time).
Anything you do that is successful will be stolen/copied and there is nothing you can do about it. With proper planning you can use this to your advantage.
Maybe you can share the idea with us and might might be that some people would be interested if the idea is something which could be attractive.
if you have great ideas/brilliant ideas you should have a well planned strategies in implementing it so that no one will stolen it out from you cheers