Very cool idea from a former taxi driver on MR:

[I]f your car is ever stolen, your first calls should be to every cab
company in the city. You offer a $50 reward to the driver who finds it
AND a $50 reward to the dispatcher on duty when the car is found. The
latter is to encourage dispatchers on shift to continually remind
drivers of your stolen car. Of course you should call the police too but
first things first. There are a lot more cabs than cops so cabbies will
find it first -and they’re more frequently going in places cops
typically don’t go, like apartment and motel complex parking lots, back
alleys etc. Lastly, once the car is found, a swarm of cabs will descend
and surround it because cabbies, like anyone else, love excitement and
want to catch bad guys.