Sometime we spend time on a project for the good of the community, and it's ok, because sometimes I give back time, sometimes someone else does and so on. It's

Sometime we spend time on a project for the good of the community, and it's ok, because sometimes I give back time, sometimes someone else does and so on. It's also ok to try to get some money out of your time, if it's desired. Not ok: use someone else's time to gain personal profit, expect someone else to pay for your actions, etc