In addition to updating our partner comms through email/SMS, it could be helpful to have an automated feature that hides a listing after a partner is 15 days past their past due payment date. This way we can set some sort of consequence for not updating payment information, and it could incentivize partners to act with more urgency to pay.
At the moment, we're tracking past dues in Airtable and leaving those partners live until we hear back. All deactivations/churns can still be manual, so we can track reasons/try to sell them back.