I know, I gave minimal details, because there's too much to tell. I can make a bigger post one day about the history of squatting in NL. But here's some more juice.

Squatting is a subculture overlapping with groups like socialists, anarchists, anti-fascists, animal activists, punk, etc. The community in Amsterdam used to be highly organized with different headquarters (kraakspreekuren) around the city.

These kraakspreekuren (squat talking hours) were usually held in strongholds: big houses or streets where a lot buildings would be occupied. Usually the main organizers, leaders would live in these places and these spots would host give-away shops, cheap vegan diners, bars etc. They were public social spaces where they'd also teach how to find and open up a building.

The community was highly structured/organized. Once you 'belonged' or squatted with a specific headquarter or within a certain area (they were keeping records of available houses), they'd want you to also contribute into aiding other squatters; i.e. opening up new houses, show up at emergencies, have your house available so that it could used as a gathering point for Sunday squats, etc... It was not obligatory to participate, but within the culture everyone helps everyone, so it's frowned upon to just use the kraakspreekuur to get your house. 'Wild' squatting they used to call that.