On budget airlines you almost always only get a backpack included which goes under the seats. They usually bundle the small onboard suitcase option with "Priority boarding", usually because people with suitcases board slower and splitting up those with suitcases and those without speeds up boarding. And if you don't have Priority but come in with a suitcase you will 99% of the time be stopped and forced to pay a fee.
IMHO it isn't a terrible policy per se since it allows for savvy, usually younger, and usually poorer travellers to get even cheaper plane tickets and travel more but I do think there needs to be a cap on the price of "Priority" since during busy times the budget airlines, especially WizzAir in my experience, jack up prices substantially. I had to fly in my suit for a wedding once because the "Priority" charge for both ways was 130€.
IMHO it isn't a terrible policy per se since it allows for savvy, usually younger, and usually poorer travellers to get even cheaper plane tickets and travel more but I do think there needs to be a cap on the price of "Priority" since during busy times the budget airlines, especially WizzAir in my experience, jack up prices substantially. I had to fly in my suit for a wedding once because the "Priority" charge for both ways was 130€.