Zero reason, though I'll literally ask when I return to the hotel later. I in fact originally cancelled the stay for the day after I recieved the points (sent a thank you/sorry messege of course) hence my posting here. As I thought I wouldn't see them in person again.

I did rebook another 3 nights (one day at a time) as I extended my stay in Istanbul for a bit longer before my flight tomorrow. If there was a complaint I assure you I would not be posting this asking for clarity, I don't come here to spread or give false information.