#WizzAir charges a "Service Surcharge Fee", 10EUR per person per flight.
It's silently added just before the payment screen when booking in their their app or on their website.
They claim it's "applicable to bookings made by automated systems." 👀
What does this mean in practice?
Based on some poking: you will get hit by it if you have an adblocker, use Firefox, or if you are not allowing WizzAir app to gather data from your phone (for example, because you use a privacy-enabled Android fork).