I will give you an example that is probably the most fitting and simple one that can be found:<br>  There is a shopping mall.  A company comes to her because she wants to open a shop.  The fee for a place in a shopping mall (which is the owner of this place) is fixed.  It turns out that the store is doing better and better, and thus directly tells the owner of the gallery that from today it will not pay the rent anymore, because business is booming ...