Economics

In the Netherlands we have "anti-kraak" (anti-squat). Organisations get hired by empty property owners to fill it with temporary (short or long term) tenants. They don't get paid but they pay well below market rates rent. Some of them are gonna look a bit more like a squat but there's also totally normal houses/apartments.

The laws protect squatters and renters very strongly here so I think that's how it came about.