The initiative and the idea is great, but the project ended up dead like most. Hence we are using the same idea but will execute it better. If there was any better way to describe it we would have done it.
Hope this awnsers your question.
although the idea is good it doesn't mean you can copy their idea because they already work hard start their project
so if you think the idea is good why don't you just talk to their dev and ask him if you can work with him instead?