Elon Musk: I want to buy Solar City. Can I get a family discount?
Lyndon Rive: Everyone gets a family discount.
-- Sometime later --
Lyndon Rive: Hey Elon, can I get a family discount on a Model X?
Elon Musk: ...
(in that case he'll regret not giving a steep discount on that Model X)
Elon Musk: I want to buy Solar City. Can I get a family discount?
Lyndon Rive: Everyone gets a family discount.
-- Sometime later --
Lyndon Rive: Hey Elon, can I get a family discount on a Model X?
Elon Musk: ...