It depends. I have had some experience with VDB's and usually they offer you a hotel night and a seat on next day's departure. But if you ask them, they might put you on the next available flight if there are any free seats.
i don't wanna spend the night...stinks there's only one flight a day.
what do they normally offer? cause i don't fly SK hardly at all. so a credit won't do me any good anyway hah if they offered me C on the next flight, that could be tempting!