Would seen to be the assumed and inherent responsibility with regards to the use of open source (FOSS). Contribution (Not specifically money, but it helps) to the open source community as a whole, by users just want free with no strings and full (What do ya mean support is only email and you will get back to me when you can! I wont be bothered to read anything and can't figure out how to do something simple). Adding bugs that are found to trackers, maybe even fixing the code if you can do it. Helping in forums with the knowledge that you have. Promoting the use of open source and the responsibility that follows. It would seem that "most" want everything for free and on a platter waiting for them without the contribution part. I have been there in the past and I can see the error of my ways. Sometimes the contribution can be in the most unlikely ways.
An author I have followed (All of his books are released in digital form for free under CC) is self publishing a book (Dead tree, limited edition) that is a collection of past works and includes all the digital files for the works. E books, audio books, whatever is avaiable for the contents, all licensed under CC. He was looking for some cheap hardware to clone the SD cards that are included in (Yes attached in the cover) and I wound up recomending some hardware and writing the software to perform the cloning. The code is being wrapped up, along with the program and install instructions, for all to take for free later this month once the website is updated for my FOSS contributions, as small and somewhat insignifiant as they are. We are only as free as we help with the free.