Thanks, yep finally found it, it is per stay, regardless of nights. So would only get ~2 stays a month. So 1000 air miles a minth, but what does an air mile translate to? How many do you actually need for a flight.
Also it says AIR MILES® will earn 20 reward miles per stay, so on that scheme does an air mile actually translate to one air mile so a 20 mile flight would be free (apart from taxes)
Edit - found flying blue scheme
30,000 points needed for return to Moscow. That would take ~60 months. And only worth £160.
I'll stick with amazon vouchers, worth many times that.