Ryanair's CEO, Michael O'Leary, appears to be benefiting from a public feud with Elon Musk, with the airline reportedly seeing a boost in ticket sales. The online spat between the two has been marked by insults, with O'Leary seemingly unfazed by Musk's comments. The exchange has prompted Ryanair to offer a promotional sale, with the airline forecasting a rise in passenger numbers.