I am not sure. I know how is it in my city. It got bought out by few foreign companies. The property tax is not very significant compared to having much higher rent in a year for foresable future.
Don't forget if nobody is renting then nobody is "destroying" the property. That's other tactic. You reconstruct everything so its "too good" to be rented cheap. This way you lower the pool of "normal" flats so their prices go up to a point where the "too good" is the only option.
It's apparent from the increasingly huge differences between rent prices. Often times the longtime landlords who own maybe one building are renting so it makes them enough money to take care of the property + good profit on side and they are happy. They don't check market prices often and are 30%+ cheaper. The rent prices are completely fabricated with no relation to running costs or price of the property.