I think that perhaps there is some misunderstanding regarding how an availability display works , it is not cumulative , ie , if you see

Y7 M7 T7 U5 N5 L3 Q2 S2 K2 H0 V0 O0 W0

that does not mean that there are 7 + 7 + 7 + 5 + 5 + 3 + 2 + 2 +2 ( total 40 ) seats unsold in the economy cabin ( in fact with overbooking practices it does not necessarily mean that there are any seats unsold* ) - the odds are that if someone booked 2 K class seats the Q and S would also disappear and possibly some of the other subclasses would reduce in number . So the number of seats 'available' for sale might have been a much lower number than first glance would indicate.






*Back when I was in the industry I can recall talking to an 'insider' at an airline with whom our company had a close relationship - the availability display showed quite similar to the one above , however , the flight was already oversold by about 50 seats - this was on a sector with a very high historic no-show rate , sure enough my pax reported that on his flight there were several empty seats