For the same reason, every year there is a news Ryanair is considering standing room in their planes. This is absolutely against regulation, and they do not consider such thing, but it is good for publicity: they strive to offer the lowest prices.
it also means that they don't have to pay for advertising space and The Guardian can run their stupid BS quotes as headlines to drive clicks. The newspaper gets more hits and Ryanair gets free brainspace in readers
