Why can relatives and friends of Hilton employees only book hotels?

Friends and relatives of Hilton employees can only make reservations at the hotel. This is because the price of hilton employees' relatives and friends is set by the hotel itself, and the hotel can only book at a discount after checking its identity, so it can only be booked at the hotel. If you can book online, it will destroy the price fairness of the network. It will bring unnecessary trouble to the operation of the hotel.