The listing is new, it also offers the 20% promotional discount for first 3 bookings before 24 februari.
As the host manages 15 other listings, with a lot of reviews, there is IMHO no reason to assume the listing is not legit. The non-refundable policy is an option for guests to have 10% discount, but take the risk of not having to cancel the reservation themself and get no refund.
But if the listing is not legit, you can contact Airbnb and, after their investigation, Airbnb can cancel the reservation on behalf of the host and you will be refunded.
@Anne12167