People need to realise that gate rental is not what ruins you income, it's maintenance. Last round I had 600+ gates that cost me 100 million monthly, while maintenance for all aircraft making those routes were 800 million. So adding a lot of freq that cost aircraft is so stupid especially since the DOP per freq is really low. If DOP is 50K for 1 freq, it might be 75K for 5 freq, making it a nice 15K per "route". Then subtracting gate fee and maintenance, and not to forget the actual cost of the aircraft you will be a snail in the rankings.