Need on everything or lose out. when I'm in a pug i will always hit need. If I'm in a pug its because no one in my guild was online so I'm just doing the FP for myself and i don't really care about those I meet in pugs because at the point I'm there for me not for anyone else. Besides I'm sure that everyone needs the credits from vendoring stuff they don't use
With that attitude be prepared to get vote-kicked and ignored often.