- Microsoft built this as well, it's called Bing Code Search: https://visualstudiogallery.msdn.microsoft.com/a1166718-a2d9.... It fetches popular snippets from StackOverflow and it should come with nice integration in Visual Studio, but unfortunately it doesn't work for me. I don't know what they're doing with the project but it seems they abandoned it.
- I never heard of your project. I can't use it if I don't know about it.
- It's probably too much of a hassle to search for your site and then search for a snippet. I'm better off just searching for the snippet on Google, much faster. StackOverflow usually provides multiple different ways to solve a problem.
- You don't want people to submit their snippets to your site. Too much effort, won't work. Just get the data from stackoverflow if you're going to pursue this idea.
- How will you make money? Or isn't that your goal?