It depends on how you define contributing, I do not actively contribute source due to the fact that I do not want a conflict of interest to arise on ownership o

It depends on how you define contributing, I do not actively contribute source due to the fact that I do not want a conflict of interest to arise on ownership of IP with a client. But I am heavily involved in beta /release candidate testing for several projects as well as bug report submission and general community information dissemination all of these things are passive contributions to the projects and communities around those projects.