In Amsterdam you can only AirBnB your house for 30 days a year. So normal residents can rent out their house when they go on holiday, but you can't buy up living space for only renting it out on AirBnB.
If it's over 50% or you are not living there at all, you need a permit.
http://www.haniotika-nea.gr/90-meres-to-chrono-i-enikiasi-me...
It's 90 days, 60 days on small islands and you can only go over that limit if you're low-income. Compliance is a different issue, because Greece, but hopefully AirBnB and the other platforms will help police this.
Why ? what's different about dutch culture?
Instead of a new hotel or hostel getting built, there won’t be demand for it and an apartment will be built instead (or some other structure).