[Vinnl]

Non-paywalled Dutch language link: https://www.ad.nl/amsterdam/verhuurplatforms-door-registrati...

> Het gaat vooral om slapende advertenties van woningen die al een tijd niet verhuurd werden.

> It mainly concerns sleeping listings of units that have not been rented out for a while.

The number of listings is also expected to increase again if the number of tourists bounces back up after Covid.

Of course, the linked article also mentions this, albeit without claims of it being large part of the number:

> This may concern ‘dormant’ advertisements of which the tenant is no longer active. For example, because the corona pandemic has shut down tourism in Amsterdam for a long time.