> big companies are using the project and need a lot of things as well from it in order to keep their projects healthy, but in most of the cases this is a talk in just one way.

This is everything with what's wrong with open source. Many companies treat open source as something they have a right to consume and no obligation to support financially or with dev time. Some poor schlub is on the other end working their butt off and feeling guilty, while the company realizes all the value...