I tend to offer to help, if it's needed - it's taken. If not needed, we congratulate and part ways.
I've helped some and been offered or helped by others that didn't have anything to gain, or wanted anything in return.
There have been a few that I've passed by, generally for reasons that were my own, usually reflections on meeting the person, their manners (lack of), or their lack of common sense in executing their hunt.
