The statistics used to provide a sort of leaderboard are somewhat flawed.
They only cover passenger numbers and dont take into consideration distance. Ie an airline with 1 ATR would be placed much higher due to short flights than an airline with one cs100 running a longhaul route despite the cs100 potentiality having a greater seat/km ratio.
they show as advertised.
so your point being?
I wouldn't say they are flawed, yes they cover passenger numbers, but if you click on a chart based on passenger numbers surely that what you expect? If your aim in gameworld is to carry more passengers than anyone else, then that is a statistic you want, but it is your choice to treat it as leader board.
The suggestion is a statistic chart based on SKO which I agree with, but that in your theory that could be flawed as I may wish to measure success load factor?
Sorry, passenger per km would be best