I was reading this on airlinequality.com :
"Recently flew from Doncaster to Pisa in mid week. Plane was obviously going to be half full so why pay £2 for a priority seating ticket? Got on the plane to see that half the seats were blocked off. I was crammed in the middle seat between two fidgety people on a plane only half full. Never saw that scam coming. "
What does "half the seats were blocked out" mean, and why do they do it? Is this a regular process? I used them on trips between HHN and SOB and that flight was not even close to full, but they did not do anything like that!