The guy whose videos you won’t click lol says that someone at Air told them that this is being done by the software when young (under 21 iirc) guest tries to book a whole house last minute, to try to curb partying. I took it with a grain of salt. Sounds like conjecture out of a CS rep’s backside but who knows.
I would like to block under 21 guests full stop. I would be irritated to know the software can be ageist but I can’t. (Yes, I already do block same-day bookings.)