I'd like to say I feel a lot better about having AirBnB help handle any problems or disputes that makes it worth paying some overhead... but it's really the other way around.
>I usually find the place I'd like to stay on AirBnB and then google the title & description and the property management website usually pops up.
Maybe it's selection bias but 80%+ of the airbnbs I stay at are mom and pop establishments with 0-2 other properties listed on their profile. I doubt they have enough scale to bother set up a separate booking website for their properties. That said I have noticed hotels advertising on airbnb, but they represent a small fraction (ie. <10%) of listings that I see.
I usually find the place I'd like to stay on AirBnB and then google the title & description and the property management website usually pops up.
Since they don't need to pay AirBnB, its usually 20% cheaper via their website or calling.
AirBnB takes an obscene amount for doing almost nothing.