I suppose this goes against the common idea here on HN that the idea doesn't matter and you should share it with everyone, even during the early stages of a startup.

Zynga shows me exactly why I don't share my ideas early on: A company with more money and more resources can bring the idea to market much faster than a 1 or 2 person shop.

I think the people that keep spreading this idea have the resources and money to 1) create their own ideas quickly and 2) take someone else's idea.