Doubtless you have heard of Uber, the online taxi-hailing service. Most likely you have heard of Airbnb. And Snapchat? Probably. Dropbox? Very likely. Spotify? Of course you have. Even if you haven’t used them yet they are sitting there on your smartphone, just waiting for the day when you suddenly find that you want whatever it is they offer. But be quick: most of these companies will soon be forgotten.
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