But there was a period where only people who used more the 500 units had to pay the full Ft surcharge, if you used less then 300 units you got the biggest discount, 301 - 350 units still a discount but a lot less etc etc so it was a sliding scale.
even in the period March - April people got a discount on the Ft if used less then 300 units but I believe the discount stopped for people using more then that.