It's not about leaving Airbnb or Booking. It's about knowing how much it costs you to depend on them and what could change if a part of your reservations came directly.
The commission seems small when you look at it reserve to reserve. By accumulating nights, months and several houses, the context changes.
Enter reservations, average price and approximate commission percentage.
Dependence on platforms has a cost that should be known before deciding how to grow.
You don't need to replace all channels. Try what happens if a fraction of bookings arrive on your own website or repeater customers.
Use potential savings as a limit to value direct booking, marketing or automation tools.
You don't have to have exact figures. You can start with approximations and then adjust the result.
Use the result as a limit to value PMS, channel manager, direct bookings or automation. Eleqia Match reduces options for homes and channels.