[apk17]

It shifts the balance. Even if my hotline gets bombarded by mechanical turks the costs are the same on both sides.

Now google duplex can go and phone up every businessowner asking for the current store hours (or whatever), thus dumping the work of updating google's information on the store owners at essentially no own cost.

And the store owner does not even have a chance to find out whether it is a customer that will in some probability show up, or if he's just being used.