I have only recent direct experience (OTAs all being 10-12%), but I do know one recent change is that “AirBnB model” listings are turning up on Booking.com a lot more now (renting out your holiday home as if it were a hotel with one unit). I know AirBnB charges 20% commission (I think they call it a service fee), perhaps for these cases Booking.com is offering those operators 20% as well.
That makes perfect sense, they were the same type of single villa style. The biggest things I discovered is that while airbnb charges the host 3-4%, they charge the guest 9-15%. Booking.com reverses this and charges the guest no fees while the host has all the cost, 20% and the most risk if the charge/credit card was fraudulent.
