Tow Truck Drivers Using Storage Facilities

I've noticed a lot of towing/recovery companies abandoning vehicles at storage facilities...I wonder why that is?

Maybe it's cost effective...dunno.

Or maybe some of these drivers are just starting out and don't have lot of their own.

Or perhaps they have a lot, but are limited on space. Maybe they only keep the really nice vehicles on their lot and store the turds at storage facilities. That way, if the owner of the vehicle never picks it up, they're only out $50.