I noticed a couple of old threads from 2017 and I think this is still relevant today as it has not been addressed by Airbnb.
I received a message (ok it may be automated but someone had to write it in the first place) containing the following:
Your listings may be suspended
You declined your last 3 reservation requests. Keep in mind that Hosts who decline an excessive number of reservation requests may have their listings suspended and removed from search results.
At this current time during Covid and for the last 14 months it has been a real struggle so to receive this message is in my opinion most unfair, worrying and threatening!
I actually have "24 hours" booking notice activated for my property yet I get messages from Airbnb/guests asking for approve/decline booking for same day bookings which I do not mind as long as I am able to choose to decline if unavailable but obviously doing so then gets you this threat. All three have been in the last month and all in the afternoon/evening of the day they wanted to stay and one was actually on my doorstep doing the booking. All guests have been understanding in that it was short notice and that I have a life (such that it is).
I have complained to Airbnb via feedback as advised by one of their representatives.