Having different fees is fine. What is troublesome is that AirBNB doesn't immediately show the total price (including all surcharges). I think recently they finally were forced to do that in the EU (before that I used a browser addon). That the initial price includes all the additional surcharges has been mandatory for quite a while due to companies using this to trick customers (e.g. advertising 200 EUR for renting 1 week; practically you need to pay 700 EUR).

Note that various companies still try to skirt that bit (surcharges only shown at a later stage). E.g. mandatory "booking fees" and so on.