I guess I can't blame you for philosophical differences. Personally, I do a lot of research before investing my time in building something. Not only do I try to avoid NIH, but I prefer investing my time in clever and useful things not done before -- I tend to think I'm good at producing novel things. I suppose others doing something similar a year later and getting more attention comes with the territory.

Now... open source vs commercial, that's a whole different discussion (although probably not what you'd expect).