I have a perfect example of that.. This week a member at WHT contacted me asking various questions about becoming a VPS provider. Many people would've just said "you need to figure that out yourself". And although it was helping the competition, I only spent 1 hour+ guiding this guy through his options, my suggestions, etc.

Long story short. He's hired me to design/develop his site & help setup shop. A project that'll keep me quite busy the entire week, all for an hour of "just giving back".