I don't get it, how can a privately owned company have any interrest in stocks from a company, that's not allowed to generate a profit? Other than what is needed for investments in future upgrade/development?
Doesn't ICAO state you're not supposed to take more from the airliners than needed to keep operations running (included future investments)?
(Enroute that is, I suppose TWR/APP part is a little more on normal business terms)