They’re a two-sided marketplace where the parties are incentivized to be adversarial. Every renter want to pay less / get money back, every landlord wants to minimize cost and stick renters with extra costs.

There’s a reason municipalities have landlord/tenant laws, and Airbnb’s whole thing was offering hotel-like services at sub-hotel pricing, without hitting landlord/tenant.

They’ve arbitraged themselves out of existence (but not before making a nice profit for Airbnb shareholders).