I’m not against paying a fee for the larger cabin luggage on low cost airlines. It makes sense that something that adds weight, thus more fuel costs, be a premium. What I’m against is the price. I have paid more than half my ticket price, for an item weighing a 10th of my weight. I f the extra was say 5-10€ I’d be OK with it. The extras are sometimes reasonable. The prices not. Also, paying extra for unavoidable fees, like airport fees, should be considered false advertising.