One aspect of this article that I think is lacking:

'How might Airbnb increase rents? Primarily by taking units off the market.'

I think yes and no. It's true units going off of the market are reducing supply and justifying increase in cost. But I think what is much more insidious is that a landlord can make more money with AirBnB, and that's what really drives up the cost of all units: that there is a more profitable alternative use, so locals have to compete with prices that tourists will pay.