The Idea of Open Source

I like the idea of open source.
I found out during my life that I need to communicate my ideas with somebody. It isn't the same as asking for advice. Sometimes only the fact you have to formulate your idea helps you to understand it and to see it from another point of view. And then you see it, you can solve the problem (if there was any), you know how to continue in your work. Without any comment, without any help.Sometimes it is easy.
Another good idea of open source is that you can contribute to projects if you wish and know how. And even you can evolve it.
So there are more ways how to "repay" the effort of other contributors. The donation is not the last one. :-)