Permission to Occupy.
Effectively he has that piece of land because the Chief/whatever allows him to use it. There are rules and such around it but he doesn't own it, though its sort of expected to pass down into the family so now he can hinder his photogenic progeny with the maintenance...
It does for them.
They get complete charging data, and a predictable long running income from the user that would outweigh what they would make from the user otherwise... Win win for them.