@Vee-Gee0
Airbnb have no checks and balances regarding third party booking other than they don't allow it, they allow it, and take their circa twenty percent fee until there's a problem then you’re on your own as a Host.
Airbnb have no skin in the game, so they simply don't care, and the Guest will probably get their money back if you turn them away at the door.
In my experience about 30% of my guests where third-party bookings, Companies booking for employee’s, mummies and daddies booking college going children and gifts,
I let these booking go as my apartments where not very high spec. (no microwaves, coffee machines, dishwashers, TV, DVD, TV Streamers, radios etc)
Airbnb is big business and the nonsense propagated by senior management that it is a community is completely nullified by Airbnb’s terms and conditions.
Most Hosts turn to the community section for help because a circa 30Billion dollar can’t or won’t supply appropriate help and safe guards