@Linda3151 Airbnb is just a listing service. They don't "associate" with anyone. They don't even require hosts to submit any paperwork which verifies they are the owner or have permission by the owner to list. Home owners have had situations where a long-term lease renter listed the place on Airbnb without the owner's permission and in contravention of the lease prohibiting sub-letting, and Airbnb won't take the listing down.
It really falls to guests and hosts to try to check each other out by reading reviews and communicating via messaging.
I'm glad you've had some good experiences with Airbnbs and I'm sure you'll have more. Sorry you got screwed by Turnkey.