And don't forget that the more area they cover in each country...

And don't forget that the more area they cover in each country then the more area they have to cover 3/4/5 times every year - flying the same precise tracking. This is an expensive exercise considering the weather and other factors. It requires a fleet of specialised aircraft with appropriate certifications and clearances, etc. It's difficult to see any other company coming close to what NEA provides which means that it has a wide moat.