AirBnb was maybe the worst of the bunch, because it has such a dramatic negative externality on housing markets. Entire areas of Barcelona have essentially no real residents because even those who didn't sell to AirBnb investors found it unlivable with drunk tourists screaming around the apartment buildings at 3 am. I stopped using AirBnb because it was making it enjoyable to visit other cities, but destroying my own. It's also a lot more expensive for fewer amenities.
Spotify hasn't made any money yet. I wonder if they're going to start charging $30/month. Time for the return of CDs, vinyl, MP3s?