At the end of 15 years, the customer owns the system outright.
If a customer owns a card then he enters it.
The cost of putting up the lights is less in following years because the customer owns the lights.
The only requirement from the company was that the customer must own the land on which the house was constructed.
The network would undertake to sell the cars its customers own but no longer use, and to start accounts with the money.
Say a customer owns that stock on margin and the price goes down.
While that does not answer the question of which customer owns the stock, it is a start.
When buying, a customer doesn't own a car either.
I've long believed that customers of any application own the data they enter into it.
Formally the banks are considered self-owning and not customer owned.