But the fuel rats don't retaliate. Oh, that sucks, not a real rescue, clear it off the active board and return to standby. They'll respond to the next call just as eagerly.
They also go way above and beyond. There are famous cases where they rescued explorers "outside the bubble", who were hundreds or thousands of light years away from inhabited space. Reaching them requires hours of real-time play, careful planning, and a very well outfitted ship.
When those calls came in, several people, who again I remind you get no rewards for this, signed up for an hours long trek out into deep space to rescue the stranded explorer. Due to the distance they usually dispatch more responders, just in case one of them miscalculates and ends up in distress themselves (e.g. warping to a star type that you can't refuel from, with not enough fuel to reach another star - that's how things go wrong for deep space explorers).
I dunno, I find that pretty neat.