It was a great idea to use git and create portal like GitHub and share source code among other developers. One of the benefits is, you do not need to reinvent the wheel and just use package you need. And because lot of users will add it to their projects, it gets well tested. But I can see there a big problem: maintenance.
If you are working on a project, you sure use open source projects, libraries and frameworks. All these stuff helps you build something amazing and do it faster. And also you know what a good feeling it is, when someone write a good review or give your fan page like. So do the same.