Prince Harry and Meghan Markle are “insatiable” when it comes to promoting themselves. With the recent premiere of the ex-actress’ brand American Riviera Orchard and the Duke of Sussex’ interviews and tours, royal expert Tom Bower shared how Prince William and an ill Kate, Princess of Wales, is “deeply upset” by the pair’s “brand operation” being “rubbed in their faces” as the future queen struggles to prevent a cancer diagnosis. “Not only is there the pressure on William, but also the constant sniping from California,” he added. “I’m sure he’s furious with Harry, he’s behaved appallingly.” Th…