@SitFeesDestroyCommunity, it is not clear whether you observed this listing on THS platform or are actively sitting a property with internal cameras.
If you observed a listing - THS Forum members have repeatedly encouraged THS to launch a ‘report’ button to aid their team to identify, educate or remove pet parents or housesitters that clearly breach THS policies. Without such a facility then there is probably nothing that you - or anyone can do.
If you are on a related housesit - raise a THS Member Dispute. This protocol seems to be how THS formally investigates, assesses and resolves significant breaches of THS terms & conditions.
For context, below is url to another Forum Thread re ‘listings getting through the net’ - over 370 posts on related topics. THS level of enforcement of its policies seems unclear, but evidently a steady stream of non-compliant listings continue to be made.