It's not surprising at all. All of these review-driven P2P marketplace businesses end up with the same problem. After the initial phase of early adopters that offer generally high quality products, a flood of fake or low-quality listing tries to squeeze money out of the platform. These people are not listing their homes on Airbnb, they are trying to make a living by extracting as much money from the platform as they…
My family went to an Airbnb (basically they were selling themselves as sort of resort) and when my wife saw she had to cook, etc... She was really mad. The listing didn't say it. Long history short, never again. We're going to resorts and hotels ever since. The extra money is not that much since Airbnb basically ramping up their prices.
To me, it's worth it to get consistent quality, guaranteed privacy, no questions about safety, and again, consistency in quality.