There's no reason not to use Github, we are not competitors - in fact, Github sponsored us in several events we ran. We are not a social coding / repo service like Github, but we perform a different function - we curate components and provide a platform to gain attention. In addition we provide the ability to charge for licensing, creating another incentive for sharing code and for maintaining it over the long run - basically run it like a business.

Consider that Github has almost 3.5M repos. It's not easy finding what you need and also evaluating the quality. We try to reduce that friction for best in class components.