I wouldn't be surprised if the resolution of those cameras 20-30 years ago was bad enough that it'd be easy to hide one's face/features. And since the car wasn't theirs, they wouldn't care about the license plate showing up on a camera.
The latter. I knew a guy who used to steal a neighbour’s car to run weed across state lines between the pet stores that ran the show. He made more than enough to fill it up, which he did, religiously, as he felt it was bad karma not to - he usually did it one village over. Dude even got the thing valeted one time, although that was because one of the aquariums sloshed.
I honestly wouldn’t be surprised if it was something similar - I know that the whole setup was something his boss at the pet store had devised, including the “treat the car nice, fill it up” thing, so I’d wager this was maybe a Thing.
Unless OP’s aunt lived in Chicagoland, in which case it’s maybe a more specific Thing.
