For one, because AirBnB has multiple competitors. HomeAway is the closest thing, but traditional BnBs and hotels are playing in largely the same space. For two

For one, because AirBnB has multiple competitors. HomeAway is the closest thing, but traditional BnBs and hotels are playing in largely the same space. For two, they're not actually setting the prices, the property owners are doing that. They're recommending prices, which is very different. Feels kinda weird to be defending AirBnB, since I work for Homeaway. ETA: Probably the closest analogy would be the infamous Manufacturer Suggested Retail Price, which is quite legal as long as they don't actually force the retailers to stick to it.