I dont see how network effects applies to Uber/Airbnb because nothing stops drivers/hosts from listing their property in multiple such apps

People continue using Airbnb because that's where the properties are listed. And owners keep listing properties because that's where the users are.

My point was that nothing stops hosts from listing their properties in AirBnb as well as a competitor. Unless AirBnb penalizes delisting or enforces price parity I guess?

Do you understand network effects? It’s not hand cuffs. I can also sell my rare baseball cards outside of ebay. But…