It's double edged: if Airbnb didn't exist, more hotels would pop out, so tourist flux may be the same long term. On the other hand, in hot spots, airbnb ruins living in the city for locals: ppl specifically buy property to use it for short term rental, as result price for longterm rental is skyrocketing, incentivising ppl to move out of the city. Also, since prices are so good, even locals that already have a property are considering moving to get extra $ and as result the city becomes predominantly dominated by tourists, esp the center. Prague is a prime example of this problem, but I guess there are others