Given the rise in cases of cars with keyless tech being nicked without the keys recently, as a consumer I’d be HUGELY wary of anything like this and likewise for the creator/seller of the service, you’d have to be supremely confident it wasn’t easy hacked.
+ leaving expensive stuff in car boots?
+ giving a courier (assume they’ll have extensive background checks) access to potentially very expensive cars
+ I assume they find the car via the same mechanism that allows you to open it remotely, some kind of GPS thing? Otherwise you’ll have a courier driving around and around a multi storey car park looking for a white Audi A3/A4 etc of which there’ll be hundreds.
Quite like the secure box at home thing though but that could be done easier by having a secure box somewhere with a steering lock type mechanism in it. Leave it open when you go to work, courier delivers something, closes the door and presses the lock down, locking it for when you return home and open it with your keys…
Royalties can be paid to…. (although I suspect that idea must exist somewhere already!)