this was a refund I authorised for a future guest so he could receive a full refund rather than partial as I know I will re-let and he made a stupid mistake with his flights. Anyway, it seems the 'customer service' person (NOT HELPFUL AT ALL) was wrong, and that airbnb just word their messages badly and say in their message, "you have sent X $500" or whatever when they mean "we (airbnb have sent x $500"
We shall see. I don't mind funding the refund if I am going to receive it at the future date, though it is annoying to be banker for airbnb, allowing them to invest in crypto or whatever they do, and we have to hope they still have our guests' money at payout time....
I refunded through covid way beyond when we had to or when airbnb were just doing it anyway. tightened my belt and got on with it with a clear conscience. Booking.com don't take your money as a guest til the day you arrive, so I NEVER use airbnb to book places to stay, always BOOKING.com.
the second human I spoke to was very helpful at airbnb. Not reading from a script.