Thing is, the cleaning fee is "just" a fixed fee that goes down, as a proportion of your total bill, the longer you stay. Not really a bad deal.

People would have accepted this principle just fine if they just put it in the damn total price shown, so you could do a fair comparison between your lodging options.

They could have structured their reservations system the same as say, Hilton does - when you book 5 nights, and the nights vary in price due to demand, say it's $100, $100, $200, $100, $100, they just show "$120 per night (avg)".

Instead AirBNB thought they could get cute and pretend that this fixed part of the charge is not part of the price at all, it's this one separate purpose. Well, of course people are going to expect that if they're literally paying $200 for a cleaning crew (a cleaning that will take maybe 90 minutes max and cost the owner far less than $200), why the F can't they take the trash out? They did this to themselves.