Communities don't scale. Airbnb 4-8 years ago was a quirky thing that biased towards tech early adopters. Because it wasn't wildly profitable, it didn't become

Communities don't scale. Airbnb 4-8 years ago was a quirky thing that biased towards tech early adopters. Because it wasn't wildly profitable, it didn't become a magnet for scams yet. As the community grew, the population includes more diverse people (including the bad actors). Once bad actors find it's easy to get around the loopholes, they tell others and the scams become prevalent.