I guess it depends on what we mean by success, idea and entrepreneurs. Do they have to be successful on their first product? If their first product morphs into

I guess it depends on what we mean by success, idea and entrepreneurs. Do they have to be successful on their first product? If their first product morphs into something completely different from their original idea does that mean the idea was pointless? If they're not successful until their 2nd, 3rd, 4th or 60th product what's the difference between starting with no idea and starting with an idea that gets abandoned? Some examples: Id, shipped 3 games before Wolfenstein Flickr started as an MMO company Rovio shipped 60+ games before Angry Birds Twitter's first project was a podcast directory I'm sure there's hundreds of other examples.